Does the red team (ATI) or green team (nVidia) have the better drivers and performance under OS X? I mean obviously a GTX 285 would prolly perform better (unless there's something seriously messed up, right?) than the ATI Mini, but how does it fair against rival ATI cards under OS X? Which "team" generally offers the better overall OS X performance? It seems as though Apple is sticking with only ATI for the forseeable future and only offer ATI options for BTO Mac Pros. Is Apple still supporting Nvidia as well as ATI for GPU performance?