Surface Pro 4 is on sale for $50-$150 cheaper than usual:

Surface Pro 4 Sale: Microsoft Offers $50 To $150 Discount

You're right. I'd seen them before but didn't remember them being discounted so much ($150). But now that I think about it, maybe that's the usual discount.

@ Dormouse:
If you used DVI cables to do the connecting...there are many DVI protocols out now. In theory all of them are backwards compatible, but in practice there are a lot of issues that do spoil the "fun" of interconnecting devices.

Those old DSUB (xVGA) cables, without any hint of DRM measures built into that standard, give you much less headaches like this. Likely your Surface and/or dock has a much more modern version of DVI onboard which could be conflicting with the old(er) HDMI ports on your monitors. The HDMI standard isn't that much better in this regard.

It has been a real pig to deal with and isn't stable.

Are we talking about just the monitors?  Or the device in general?

I think, maybe, I might have found a working solution.

The setup described above stopped working completely, let alone just being unreliable. I think I have tried every known type of cable, adapter and interface (active and passive) but the Surface Dock never simply worked/s with them although there have been occasional glimmers of function. Latest drivers and Windows OS installed. I considered getting other monitors; would probably have been cheaper in the end than all the cables and adapters etc but would have been a relatively big expense in one lump and I had no faith that even an approved monitor would work.

I found that the Surface was becoming by far my least used device. I used my Samsung Note extensively - a better tablet anyway - and also used my desktop quite a lot. And the Surface only when there was no alternative. A much nicer device than my other laptop but equally under utilised.

But now, I hope, (and actually believe) I have a solution. I have attached another dock. This time a Plugable USB dock. I attached it first to the Surface and then to the Surface Dock and it simply worked as if working was never something to be questioned. I am using both docks mostly because I have them both, but prefer to avoid regularly attaching and detaching the dock to the USB port; the MS magnetic charger/connector is easily attached and detached without any mechanical stress on the port. It is very early days, and it might turn round and bite me, but it feels stable just as it ought to be.

It will mean I use the Surface very much more. I've been happy to use it for portability and when I'm just doing one thing, but I really like a lot of screen space for my usual multitasking.

So, I think I've made a decision, and will probably purchase this week.  But not a Surface, surprisingly.

I'm going for a Samsung Galaxy TabPro S.  I started to look at what I wanted to use it for.  Honestly, it will be mostly for light coding, markdown, writing, browsing, and reading.  With that in mind, a 4GB, 128GB, i3 or i5 is more than enough.  And in those specs, I can get something better than the Surface, for less.  I've used Samsung products in that niche before on Android, and I like them.  And the fact that it includes the cover and the keyboard in a lower price...

I've heard murmurings that the S2 will be out soon, but not sure that I want to wait- we know how amorphous 'soon' is.

I've had the same experience. But I've been waiting a while, and have seen nothing official, so I think I'm going to take my chances.

I have a desktop for my media management, but do not use it often. For couch surfing I have an early Win8 Acer Touchscreen model. It finally broke at the hinge and I was looking for a replacement. I already had a Surface 3 which I bought with a 50% discount!!

I looked at the Surface Pro 4, SurfaceBook and a 13" Dell notebook. Given my rare use I couldn't justify the price of any high-end notebooks, the rest just felt too cheap. I was down to the Surface Book and the Surface Pro 4. Although nice, the SB just wasn't worth the extra money to me.

I trolled E-Bay for a short period as well as Swappa. Ultimately a seller had 3 SP4 auctions up for sale. I lost the first auction and went to bed bidding on the second one. When I awoke in the morning I was shocked I won. I bought a SP4, pen, arc mouse, keyboard and original model dock for $750.

The extra screen real estate over the Surface 3 is great. The Surface Book offers even a little more. I also much prefer the more natural feeling keyboard that comes with the Pro 4 over the Surface 3. The charging cable was a little frayed and this wasn't mentioned and I need to replace the batteries in the pen. For the price I won't complain.

Given I mostly do browsing and multimedia consumption it's great. It is a quality machine unlike many of the middle of the line notebooks I looked at. It also has a more flexible hinge than the Surface 3. This helps make up for some of the deficiencies it has as a lapable machine.

Rumors of course have the new Surface Book coming out this Fall and the SP5 next year. It looks like people know this and are trying to sell their current units before the new ones come out. I should be able to sell my Surface 3 with keyboard and pen for around $300 so hopefully only around $450 out of pocket for my new setup.

Not bad.

My Surface 3 is an Atom, with 4B of RAM. It does okay with browsing and Plex playback.
That is pretty much all I used it for.

I hope to use my Surface 4 as a desktop replacement. I am not a coder, gamer, nor graphic artist.
Still, given there is no way to easily upgrade I went with the i5 with 8GB of RAM as a good middle ground.
I already notice less battery life than with the Atom, the i7 just wasn't right for my new situation.

Given the prices, used at least, the i5 seems to be a good middle ground. Also in that it comes with the 8GB of RAM.

Well, I actually purchased off of eBay.  Didn't really mean to, but I set up a few low bids on Gixen, and got one of them.  $635 for the i5/4GB New.  What made me even bid was the fact that I found out you can purchase a warranty.  So I'm waiting to make sure it's in the advertised condition, and then I'll buy that.  Maybe. 

Anyone have any opinions one way or the other?  It would be either squaretrade or warrantech.

It's a nice device... and I really love it after having it in hand.  My annoyances so far have nothing to do with the device.

I'm trying to get it set up, and having 128GB means I'm making some immediate concessions in order to make sure I don't feel constrained later.  One of those is buying a 128GB card, and using that for data, while I use the main drive for more integral things.

Cubby works fine with an SD card.  Not so much Dropbox and ... Onedrive?  Really Microsoft?  You tout that as one of the possibilities for adding storage... and then your own program, which you also tout as having things always available, can't use it?

I think I've found a way around it using symlinks, but it shouldn't be necessary.

Microsoft Microsoft has a 5-year $400 million sponsorship deal with the National Football League to provide Surface tablets to all teams for coaches to use on the sidelines during games, along with supporting IT infrastructure.

Yesterday, Bill Belichick of the New England Patriots, the most successful coach in the league for the past two decades, demoted the tablets to the bench, saying they were not reliable enough to use during games.

Yeah, I think the title is more sensational than the news actually is:

Belichick goes on to note that because the league manages the tablets (which sit on Microsoft-branded carts during game days) the team's own IT department is unable to troubleshoot any problems with the hardware during the week and the coaches only get access to the tablets "a few hours" before game time.

Looks more like an IT and ownership problem than a hardware problem.  Or maybe a tablet problem in general, from other quotes that aren't as sensational:

Another news outlet used more direct quotes from this coach when reporting this story, in which he said it wasn't the Microsoft Surface per se that didn't suit his work flow, but all tablets.
That's not too shocking; designers such as Marc Newson and Jony Ive are known for known for preferring pen and paper for parts of their work flow.

There was also an episode of Have I Got News For You, when Jeremy Clarkson threw a pen at Ian Hislop. We do not know if Clarkson would have preferred to have thrown a 2lb computer at Mr Hislop instead.

A good quote from the comments:

Wrong form-factor, wrong application
On the touchline, what do electronics give you that a whiteboard does not - apart from cost and unreliability?
Backup solution is an extra pen and a paper towel. With planning, you have a play book, which everyone has memorised and the coach may have printed out.
As in smartphone maps, proper planning means they aren't really required. IT is often used when people don't know stuff.
IT is not the solution to everything.

... Onedrive?  Really Microsoft?  You tout that as one of the possibilities for adding storage... and then your own program, which you also tout as having things always available, can't use it?

I think I've found a way around it using symlinks, but it shouldn't be necessary.

https://www.youtube.com/watch?v=pdU7FrmM4hU