but you will get virtually no gaming performance increase from a i5 2500k to a i7 2600k. As no games other than the new Arma game and shogun2 make use of more than 4 cores.
not sure if pcformat makes it to the States, but my fave in the uk! this month they did a test, a £300 gaming rig verses a £3000 gaming rig. the test was can you really tell the difference in gaming between the 2.
Games graphics on the £300 rig were limited to what it could handle (but as most games stem from consoles it maxed out most with a £100 GPU) and the ones on the £3000 were maxed out.
They then put them both in a room and ran games on them, but not showing the testers the loading times (as SSD's would give it away) and let people play.
The results were scary, the cheap £300 got just as much praise as the faster machine with some people saying they were almost the same rig...
the point they were proving is you dont need the fasted to do the same thing. the i7 2600k may rape the the i5 2500k in bench marks.. but what does that prove? just a lot of people willy waving