But Quad-core is essentially two Dual-cores at the price of 1.5.
I have actually spent a night a few days ago Googling about the
E6850 vs Q6600 argument, and it all boils down to two things:
- the possibility of overclocking
- computer usage - gaming vs multi-tasking
Here's one quote that made me climbed down the fence and stand on
the Quad-core side.
From personal experience I have just moved from an E6600 which ran
at stock (yuck! But it’s used for work) to a Q6600, again not
overclocked. Slightly skeptical on the effect it was going to have
on my overall computer experience (in the sense was I going to
notice the difference between four cores 2.4GHz vs two cores
2.4GHz) I figured there was only one way to find out. What I have
noticed is that over the past few weeks I can do little things like
leave my Adobe Photoshop CS3 open for days on end, or be
alt-tabbing between a game of Civilization 4 which takes me four
days to complete. Saving and exiting games is so
dual-core!
- Ilya
But of course, you can always upgrade the computer parts in the
future. Just that it costs a little more. A little more than a
little more. 
