That system should run anything you throw at, as far as the heatsink goes the one that comes with the i7 should keep you at about 60c. I've got the i5 2500k overclocked and my stock heatsink is keeping it at about 65c or so all be it ive only had it up and running oc'd for about 8-9 hours
@ ssantmyers - I kinda want to go water cooled on this build for long term life on this cpu considering the oc'ing range if the 2600k. Also i want 2000mhz ram that's why im choosing what i chose. Anything above 4 gigs if already enough for gaming which is all i will be doing on it. I don't do video editing or anything like that.