on the fm2 socket the 5800k/6800k or 760k is the best. the 760k doesn't have an igpu and can likely overclock ever so slightly higher, but the difference is negligible. usually the 5800k is on a deal somewhere an only costs $10 more than the 760k. for the price difference, its worth having the relatively quite powerful amd igpu on the apus since if you even kill a video card or retire the system to non gaming use, it has the capability to output to a monitor by itself.