Input on CPU for new rig

[tekzilla41]

I have started putting together my new rig, so far I have already purchased:

EPOX 9NPA+ SLI
1GB Corsair XMS3200 DDR400 Dual Channel Kit
Allied Tricolor 500W Power Supply & Dynex case

I am needing some input on where to go from here. I want to play all the latest games (BF2, Fear, CS Source, etc. ) on full blast. I have about $600 to spend to finish it off.

My original plan was for a AMD 3700+, XFX 6800GS XXX edition, WD Cavier 250GB 16MB cache SATA II, and another 1GB dual channel kit ( Comes in at about $600).

For a gaming rig, would I be better off with an Opteron 165 Dual core or an X2 3800+; instead of the 3700+ and extra Gig of ram?

Thanks for the advice

 

[ribbon13]

4x512MB will work, but there's a performance hit, and it's best to avoid if possible. 2x1GB is ideal.

Western Digital WD2500KS is a great performer.

Opteron 165 is the powar.

 

[tekzilla41]

From what im reading on the Opteron it seems like the way to go.

Anything will beat what Im on right now,

AMD Thunderbird @1.1
GeForce2mx 400 32MB
Gigabyte GA-7ZX w / 256MB ram

Had it since 2000