You don't really need the USB card - there will be quite a few USB sockets on the motherboard.
I haven't looked at the case you suggested but I would guess that will have front panel audio and USB connectors (they have cables with header to plug direct to the motherboard)
If you want an alternative case this one is truly excellent:
http://store.antec.c...-761345-45003-4.aspxMy preference for a PSU would be Corsair - I have built a few systems using their PSUs now and they are beautifully built and come with a 3 year warranty. Here is one around the same price mark but 600W:
http://www.amazon.co...00CXV2/dp/B004W2T2UQPersonally if I was building a system now I would go for Core i7 if you can squeeze it into the budget.
Have a look at some of these motherboards:
http://www.gigabyte....d=0&p=2&v=28(I really like Gigabyte boards - well made and they use ultra durable capacitors - I have been burned on other boards before!)
How about :
http://www.amazon.co...rboard/dp/B0064Z6Y9G(full details here:
http://www.gigabyte....age.aspx?pid=4049#ov)
and
http://www.amazon.co...cessor/dp/B004EBUXSAI know they are a bit more expensive. (You may find them cheaper elsewhere)
What do other people think?
You may also want to think of a non-stock CPU cooler. The Antec case I mentioned above is big enough to take one of these beasts:
http://www.amazon.co...earing/dp/B00631QFG8(be warned they are shockingly large and you need to check it will fit on your motherboard - note this particular one is for Core i7 processors only)
They are a brilliant cooling solution and very quiet.
You didn't have a graphics card listed on you shopping list. How about:
http://www.amazon.co...aphics/dp/B005C8RTTUThis is the one I bought recently and I have found it to be brilliant - plus if you fancy expanding later it supports up to 3 displays (either as standard extended displays or one humongous EyeInfintiy display - great for gaming!!)
(I only used Amazon as a quick catalogue - you can probably find things cheaper on other sites. Not being in the US I don't know the best places to look. Having said that you can't knock Amazon's support and returns policy and their prices are usually pretty competitive.)