Need some help on my AMD gaming build

Hello all. I am going to be building my first AMD gaming computer soon and I would like some advice. Never was good with HTML though so bear with me on the links Here's what I've got so far:

Motherboard:ASUS M3A32-MVP Deluxe/WiFi AM2+/AM2 AMD 790FX ATX AMD
http://www.newegg.com/Product/Prod [...] 6813131224

CPU:I have 2 that I'm looking at:AMD Phenom 9950 BLACK EDITION Agena 2.6GHz 4 x 512KB L2 Cache 2MB L3 Cache Socket AM2+ 140W Quad-Core And the AMD Athlon 64 X2 6400+ Windsor 3.2GHz 2 x 1MB L2 Cache Socket AM2 125W Basically just a dual core 64 X2 not sure on which one to get either
http://www.newegg.com/Product/Prod [...] 6819103273
http://www.newegg.com/Product/Prod [...] 6819103290

Hard drive, two of these at RAID 0: Western Digital VelociRaptor WD1500HLFS 150GB 10000 RPM 16MB Cache SATA 3.0Gb/s
http://www.newegg.com/Product/Prod [...] 6822136296

RAM sticks: OCZ Platinum 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500)
http://www.newegg.com/Product/Prod [...] 6820227298

And most important, graphics card: VisionTek 900244 Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported
http://www.newegg.com/Product/Prod [...] 6814129113

The monitor:Acer X223Wbd Black 22" 5ms Widescreen LCD Monitor 300 cd/m2 2500:1
http://www.newegg.com/Product/Prod [...] 6824009145

The tower:XCLIO Windtunnel Fully Black Finish 1.0 mm SECC Chassis ATX Full Tower
http://www.newegg.com/Product/Prod [...] 6811103011

Power supply: CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS
http://www.newegg.com/Product/Prod [...] 6817139006

For now I'm just going to go with one graphics card and 2 sticks of RAM, later on when extra money comes up, I'm going to double them both. Crossfire the graphics cards obviously. I'm also going to throw a Western Digital Caviar 1TB for a storage drive. As far as OS goes I'm going with Vista home premium 64 bit possibly if not the 32, don't know yet on that either.

Just trying to get some ideas and I thank everyone for their input

The 6400+ will be faster in most games. The Phenom 9950 will be faster in multithreading. The question is, does your software optimized for quad cores? Most are not.

I wouldn't touch that mobo you listed with a 10-foot pole. The SB750 is the best chipset for overclocking Phenoms. Any of these is better than that.

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