That Cooler Master case looks very nice! I think I'd like something like that, if I didn't already have a case for my RPi4 8GB model I purchased a few months ago. Speaking of...
the heatsink cases on my RasPi 4B's.
-4wd
You mean like this?

I got the above heatsink case to go with my Pi. I'm normally very utilitarian and don't care too much about how things look and just go for black, but I really like the colorful options this case comes in.
My only complaint about it is that it doesn't quite fully encase the board. Which, in practice, means that the microSD card is poking out a few millimeters, exposed to damage from bumps or drops. On the other hand, this also makes it a bit easier to get in and out. But on the other other hand, my device isn't really going anywhere (so I'm unlikely to bump or drop it) and I'm not doing anything with it that requires frequent removal/reinsertion of the microSD card.
Also, even though I don't power it on and off very often now that it's all set up and doing what I got it to do, I've found it indispensable to have some kind of power switch for the Pi for those times when you are setting it up and having to frequently turn it off and on again. I've always gone with a switch on the power cable rather than a switch on the case. Something like this:
