kk first off listen to rage =]
i made a mistake and bought a q6600, this thing runs pretty dam hot, your stock cooler won't be able to handle it
and secondly, the new q6600s won't get you very far, as most of them has a VID of 1.325
i tried pretty hard and the most the i could get stable was at 3.2ghz
anymore than 3.2ghz, i had to raise my vcore up to 1.5v for lets say... 3.4ghz, but in the end it still wasnt stable
so i'd say get an e8400 =]