Matt Holliday career at Coors Field: .356 BA, 84 HR, 312 RBI, .643 Slugging
Matt Holliday career everywhere else: .280 BA, 44 HR, 177 RBI, .455 Slugging
Granted, he had 65 more ABs at Coors, but unless he hit grand slams in all of them, seems like he's going to significantly devalue going from Coors to the Coliseum (where hitters go to die).
I'll give you Ubaldo Jimenez for him though!