Q6600 or PD 965 extreme?

I Am finishing a build xfx750imb,8mb nvsli 6400ram,750 watt corsair psu,wd640gb 7400,32mb cache, after market mascool heatsink,sli 260/216 vc's, Diablo full size case/w plenty of fans. Question-am I better off going with a new pd965ext,which i have or my q6600 from my dell xps 420. Thanks in advance. basically used for gaming

The Q6600 will blow away the Pentium in every way.

Thanks all, basically got the pentium D for nothing with a newegg combo deal, and 10% coupon. Had saw that the chip was $999 dollars when it hit the market in 2006, the 3.73 ghz, thought it was worth the question, some of my older chips that were single core,duel core- seem to work pretty good with my older systems without all of the safistacation of today's system, Give me my windows 98" Tank! with a quick os boot and tons of games! Those were the days Now you have to be a scientist, lol I wonder how much the spyware and virus programs we have to defend our systems slow down our expensive systems anyway? Thanks all for the help, great forum.