Wondering if there is a considerable performance difference between a 5770 and 5850. I'm looking for which one will last longer for games support (performance wise). I will be running at 1080p, hopefully at higher to highest settings in current games. Currently running a 4770, with a Phenom II X2 560, unlocked and oc'ed to a X4 970, and a OCZ Fatal1ty 550W PSU. I prefer XFX due to being a loyal customer over the past few years.