Best bang for the $ right now is the AMD chips. They under perform compared to there intel brothern but they cost allot less.
I just picked up
FX6100 149
Asus MOBO 10$ + mail in rebate (Microcenter special)
8gig ram 37$
KingWin 650 49$
Antec Elite case 39$
MC SSD 79$
boots up in 20 seconds thanks to the SSD plays star wars TOR superb with the GTX275 in her.
if you don't plan on gaming this pc meets your requirements. If you want to game add in your choice of mid level 100-150$ graphics cards and your set.