Q9300 Q8200 or Q6600 for best performace/power consumption combo

[1speed]

Hi all, what would be the best among those 3 for the best performance\power consumption\cost effectiveness\longevity compromise?
I'm not a gamer or an overclocking fan, but I do need some performance for OS virtualization, multi booting and such, while keeping things cool, quiet and power consumption low. The difference in price between the Q9300 and the Q8200 is pretty marginal, the Q8200 seems to be slowest of the 3, while the Q6600 is almost 25% cheaper, but it consumes more. Which one should I choose?

And while we're at it, which mobo should I choose? I'm thinking Asus P5E or gigabyte


Thanks!

[shadowpr]

Cool, quiet, low power consumption = Q9300

Want to save money, wih just a bit more heat and power consumption = Q6600

And I would probably go for a P5Q motherboard.

[1speed]

thanks