Newbie building gaming system

[rflction]

I'm trying to build a general gaming machine that will well for most games out or coming out soon (i.e. crysis, SC2, Diablo 3). What do you guys think of the GPU? 4850x2, 4870, 4870x2 (expand in future), or NVIDIA card? i'm planning on using a 22in monitor for this system.

Case Antec Nine Hundred Black Steel ATX Mid Tower
[$109.99]

PSU PC Power & Cooling S75QB 750W ATX12V / EPS12V SLI NVIDIA SLI Certified (Dual 8800 GTX and below) CrossFire Ready 80 PLUS Certified Active PFC Power Supply
[$159.99]

CPU Intel Core 2 Quad Q9550 Yorkfield 2.83GHz LGA 775 95W
[$324.99]

GPU POWERCOLOR AX4870 1GBD5-PPH Radeon HD 4870 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card
[$299.99]

HDD Seagate Barracuda 7200.10 ST3750640AS 750GB 7200 RPM SATA 3.0Gb/s
[$94.99]

RAM G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
[$59.99]

Motherboard: Any suggestions??

OS: vista 32bit or 64bit?

thanks for the feedback!

 

[auscanzukus]

Look into GA-EP45-DS3R & PQ5 PRO.

32bit for up to 4 gigs or ram. 64bit for more than 4.

Well, as always the gpu trends are getting to the mainstream way too late, IMO. The R700 (HD 4800) has been out since June. While the average Joe is getting this news, I'm looking forward to the next gen chip from AMD in Q1/09. Possibly Jan. Anything in between from AMD is old news to me.