So I'm interested in trying to overclock my E6580 past its stock 3ghz to give save from having to upgrade for now and help with some of my gaming needs (mainly FPS). I am looking for a heatsink thats got great price to performance ratio. Right now I'm looking at this [ARCTIC COOLING Freezer 7 Pro Rev.2 92mm Fluid Dynamic CPU Cooler] that seems to be popular with people on newegg and around the price I would like to spend. Are there better maybe even cheaper heatsinks than this one? and how important would it be to use aftermarket thermal paste as i have never bought a heatsink before nor do i know the right amount/method of applying it.