I bought a Corsair Carbide 500R case and H100 cooler when I built my new system because I wanted to avoid cooling issues altogether, and the case has a pre-designed mounting for the radiator in the top (bottom mounted psu). This case has plenty of room for multiple graphics cards, both width and length, and is almost exactly 500mm tall. I too have a customised stand and am limited for space – my case has 20mm clearance at the top, and my monitor about 6mm each side, so everything just fits.
A bottom mounted psu shouldn’t interfere with gfx card cooling as the inlet would be at the base of the case with the exhaust out of the rear, so I’m not sure what they are referring to. Most modern gaming cases have the psu situated this way as this permits large exhaust fans/radiator mounting at the top.
You’ll find a number of reviews on the ’net (
http://www.techpowerup.com/reviews/C...de_500R/1.html ,
http://www.guru3d.com/article/corsai...e-500r-review/ ), but they seem to favour the white model for pictures (mine’s the black one). I have built a number of custom machines in the past, and my opinion of this one is that it compares favourably with some costing twice as much (CoolerMaster HAF-X for eg.), both in terms of quality of construction and function.