Well pio I will be putting that theory to the test
I just sold my sig rig, and put the proceeds toward an e8400 which should be shipped out any time. Will be able to compare the two and end this debate once and for all
I upgraded from my amd rig, MOSTLY due to limited OC ability, and that I wanted to go 45nm. Right now my backup rig is an e6600, which I just OC'd to 3.3 from 2.4 (3.3 = what I got my 5600+ to) so im quite satisfied with this for now.
If you insist on upgrading, I suggest you go the whole way, or not at all. Dont go with an e2xxx as some suggest because you wont gain anything. Go with a e8400/q6600 or dont move
For gaming, you might actually consider the q6600, as while the game takes what it needs from the cpu, the other 3 cores can run the OS in the background, resulting, in faster game > OS commands which WILL result in higher fps over a dualcore. I went e8400 because of the higher clock speeds, 1333fsb, and in the end its basically got the same power if you can OC it decently.