Gaming Rig Advice

Hello all,

I've decided to take the path of building my own gaming rig. This will be my very first complete build. The gaming rig will consist of WoW, FPShooters, racing/sports genre games.

I have a limit of $500. I can spend $100 if the mail in rebates equal to or near $500 ($515 and below). So technically I have $615 to spend with the rebates.

If at all possible to get a combo deal that would increase the performance value of the PC I'm open to suggestions. After i'm familiar with the components, I'd like to OC it so keep this in mind as well. I'd also like to have the ability of SLI, and Crossfire compatible. If you or a friend has any components for sale matching the ones I'd like by all means PM me with condition, price, etc.

I've discussed various components with the member iBleet. After several PMs the following was brainstormed...

Motherboard: $85
Gigabyte p35 DS3L

Processor: $120
Intel Core 2 Duo E7300

Video Card: $135 (original) | $110 MIR
EVGA 512-P3-N975-AR GeForce 9800 GT 512MB

PSU: $50
Antec earthwatts EA500 500W

CASE: $70 (original) | $50
RAIDMAX SMILODON ATX-612WB Black

RAM: $55 (original) | $25
CORSAIR 4GB (2 x 2GB) 240-Pin DDR2

HD: $42
Western Digital Caviar SE WD1600AAJS 160GB

OD: $25
samsung N82E16827151171

total original = $582
total mir = $507