I'd just like to point out that if your room is warm a better cooling system wouldn't effect the temp of your room. If your room is warm your pc cooling system is doing what it's supposed to be doing, getting the heat out of the pc.
The last atx case in my house turned into angle grinder fodder so I could wall mount the motherboard. The hdd & ssd are mounted onto an adaptor plate screwed to a plywood plate which is in turn screwed to the wall, the psu is held in a similar manner with a cradle made from wood.
I removed my entire HDD cage with an angle grinder last year and suspended the HDD in the dvd drive bay with a few rubberbands (less noise, just don't forget to check them from time to time!) and stuck the SSD to the rear wall, so your argument is invalid.
Cheers! I thought it had to be some kind of paint, even if it didn't feel like proper paint. It's all down to the ED layer now I think.. Not easy to tell as it's all the same colour anyways. Hope the paint shop will accept it like this. And then.. it'll probably look a bit like a Console...