I hope this is for just the hardware for the tower. I would say...
Intel e2180 (mine does 3.3 and I think if I had a abit IP35-E instead of V it would go a bit higher).
Artic Cooler 7
Abit IP35-E
2gb of on sale ram like ocz which can be found for like $25 after rebate
9600gt
hard drive depending on wants. Watch for deals on the 500gb seagate and WD.
I'd go for a psu from Hiper or FSP for like $50 but I've never been good with knowing good psu models.
random dvdrw
cheap case
You would probably be right around $500 depending on the deals you can find. Check out Clubit.com for the cpu and mobo, I got like $15 off by buying the cpu and mobo together.