You won't be able to fit in a H50/70 (or any other 120mm rad) without either leaving the sidepanel off or cutting up the FT03. Most of the air coolers (if not all) will fit tho.
From my exp the GPU tends to get very hot without a custom fan profile(I keep it at 45% fan speed to maintain GPU under 70c). I can imagine this to be even worse with Matx SLI/CFX.
If you need any other interior details i'll gladly provide.
PS: I'm selling mine too
And I guess I'm just weird but I hate keeping my computer on the floor.. Plus the FT03 looks so damn sexy it could double up as an ornament ;o
Mind if I ask why you're selling yours Problame?