Help me build a gamer pc

OK so im somewhat new to building a pc and want a new gameing pc if you could help me pick out better stuff or reinsure what i have thank you here is my idea so far


i7 950 Build
CASE :

COOLER : COOLER MASTER Hyper 212 Plus Intel Core i5 & Intel Core i7 compatible RR-B10-212P-G1 120mm "heatpipe direct contact" Long life sleeve CPU Cooler

CPU : Intel Core i7-950 Bloomfield 3.06GHz LGA 1366 130W Quad-Core Processor BX80601950

MOTHERBOARD : GIGABYTE GA-X58A-UD3R LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel

HDD : SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

RAM : G.SKILL 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model F3-12800CL9T-6GBNQ

Case : Antec Nine Hundred Black Steel ATX Mid Tower Computer Case or the Antec Nine Hundred Two Black Steel ATX Mid Tower Computer Case

Video card : EVGA 012-P3-1470-AR GeForce GTX 470 (Fermi) 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card after i save moremoney want to add asecond one

Power supply : ?so far waslooking 850W to 1000W


Please help with ideads thank you