I am getting the Athlon 64 X2 3800+......this is the cheapest cpu i can get and have it still good quality when i'm allowed to upgrade in about 4 years
If you do heavy multi-tasking and the cash, then get an X2 4800+. If multi-tasking isn't that major a factor but you play games like Doom 3 and whatever, then a 4000+ is probably the best option.