whats budget if high go for dfi sli mobo
um a 7800gtx evga is good there ko version is nice
2gb of patriot ram(the dfi mobo is amd if thats ok and its optimized for pc3200) so 2 1gb sticks of patriot pc3200 that can run in dual channel. Ok for oc'in but not best
amd athlon 64 3700 san deigo is a good buy. If you got like 700 bucks to spend on a cpu. Then you can get a dual core but a 3700 is good and you can oc it pretty high.
Oh yeah oc=OverClock
Thats just main stuff. I recommend amd for gaming and that psu wont do atleast 500w. Try getting the psu i got. Its really good and has seprete power cables and keeps your pc clean (wire wise) my case is good too. I like it.....
i3 540 @ 3066 MHZ
4GB DDR3 1600 1T 9-9-9-28
HD 5750 @ 850/2400
Antec Lanboy Air