first things first this will be my first build so im trying to get everything right before i order parts so far im looking at
OCZ Agility 3 AGT3-25SAT3-90G 2.5" 90GB SATA III MLC Internal Solid State Drive (SSD)
Item #: N82E16820227757
Seagate Barracuda ST500DM002 500GB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Item #: N82E16822148767
COUGAR Evolution Black SECC ATX Full Tower Computer Case with Dual 12cm COUGAR TURBINE HYPER-SPIN Bearing Silent Fans
Item #: N82E16811553002
LG DVD Burner Black SATA Model GH24NS70 - OEM
Item #: N82E16827136236
SAPPHIRE 11196-00-40G Radeon HD 7950 3GB 384-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card
Item #: N82E16814102962
XFX Core Edition PRO750W (P1-750S-NLB9) 750W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified ...
Item #: N82E16817207015
G.SKILL Sniper Low Voltage Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBSR2
Item #: N82E16820231461
ASUS Maximus IV Gene-Z/GEN3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard
Item #: N82E16813131806
ASRock Fatal1ty P67 PROFESSIONAL (B3) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Item #: N82E16813157240
Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 ...
Item #: N82E16819115072
COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel ...
Item #: N82E16835103099
5 APEVIA CF12SL-UGN 120mm Green LED Case Fan
Item #: N82E16811998122
also as im getting a full case would it be better to cross fire 2 6950 2gb or just stay with the 7950 also the ssd will be used for boot drive not cache your opinions will help me decide
That case is OK. Ditch the extra case fans - you don't need them. The 6950 is fine, but the 7950 would be better. And I actually wouldn't recommend either motherboard - the P67 is OK, but the limited expansion options on the Gene-Z will be incredibly frustrating in the long run.
Also I'd really hesitate to recommend low voltage RAM - 1.5V is standard on most SB motherboards and using anything less could not be good. Stick with 1.5V.