GPU: (X2) BFG geforce 9800 gx2 maybe gtx 280,285, i would like the 295 h2o but i think they run like 600+, for the 9800gx2 there 356.99 each
What about pny Geforce 9800, $105@Newegg
PSU: ultra x4 1050w sli ready - 249.97
How about a corsair 850TX?
PROCESSOR: Intel core I7 920 2.66 GHz quad core - 309.97
I have the I7 860.
Or you could Go extreme for $1000 (A bit expensive)
HARD DRIVE: WD velociraptor 150 GB HD 10,000 rpm 16 mb sata-3 - 237.99
Umm... May i recommend a Hitachi Deskstar Sata 3G/s 1TB $89.99@Newegg
Its not as fast, but a lot cheaper+More space. Limited time offer
OS - was thinking on staying with xp but from 32 to 64 but not sure if i should try vista
You could Get Windows 7 Pro x64 OEM $150@Newegg
You don't need to take my suggestions, but im just throwing them out there.
You may be able to save a bit of money by cutting back a bit. Buy a couple more games