I just built my system about a month ago, and already I am getting paranoid that I need to upgrade my processor. Is it necessary to upgrade from E6750 to Q6600? Is there a tremendous performance gain, or am I just being paranoid? I decided it would be best to save around $85-90 at the time of purchase, but now I don't know if I made a wise decision. I don't play games and don't want to overclock this machine (yet), but I'm still unsure if I need the extra benefits of the quad core... Guess I just need to be reassured or something.