IF quad is a must have then by all means Q6600.but if is a factor then I would say http://clubit.com/product_detail.cfm?itemno=CA1906837&nav=1 along with http://clubit.com/product_detail.cfm?itemno=A4854036#
There are More of us "dedicated dont care what Intel does" people out there than you know...Proud owner of a 6000+ and wont ever switch to Intel darkside of the force! Crysis runs fine on my setup 1920 x 1200 all high settings.
AMD runs cooler, and more stable which leads to a greater O'clock %.
You could carry that argument further and eventually reach ideal game performance in something like -So if you look at those 2 you have about ~$90 difference, assuming you would have basically the same memory, case, and drives. You than would have $90 more to spend on a GPU over the Intel based one.
http://i71.photobucket.com/albums/i145/Soldier36/amd-black-edition-08-20.jpg
Ive got to be the balancing act here, too many intel bandwagon faboys on these forums. Who cares if it gives you 2 more frames per second in this game or that. Where were you fanboys when Amd was kicking the crap out of Intel P4s couple years ago. Next year Phenom 3 + Ghz quad cores will own penryn...Let the flames begin...LOL