Asus SABERTOOTH 990FX R2.0
EVGA 660 ti 3GB X2 (Yes, SLI)
APEVIA X-TROOPER Series X-TRP-BL Black / Blue Steel ATX Mid Tower Computer Case
PSU CORSAIR CX750 750W
AMD FX-8150 Zambezi 3.6GHz Socket AM3+ 125W Eight-Core Desktop Processor
GeIL EVO Veloce Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600
Seagate Barracuda 1TB 7200 RPM
ADATA Premier Pro 64GB SATA III MLC Internal Solid State Drive
Samsung DVD Burner
I think the case might be a bit snug, should I go for a full? This is a gaming rig.
The main thing I would look at changing is the CPU. Go for the newer FX-8350 it's only $20 more and easily 10% faster all round.
You shouldn't have any problems fitting everything in that case and because the graphics cards are rear venting you shouldn't have any major heat issues either. This being said I'd want to get a decent CPU cooler and overclock.
I half agree with the PSU comment. The CX series aren't the greatest but they aren't bad either, actually very good for the price. Maybe go with the TX750 but of course it costs more.