SO i bought an x-mystique from overclockers on special this week. It's a damn good card. music quality is outstanding, and gaming is a joy - i can finally hear those rears working as they should Anyway, as you may or may not know, the op-amps are socketed and as such are upgradable. Actually it's an advertised feature so im going to take advantage of it The question is: if im going to upgrade them, what should i be looking for in a replacement? I'm assuming the input voltage has to be matched, but what else should i be looking for?