Mike Miller -or- Rudy Gay?

One could argue that Miller was better than Gay last year, but Miller has reached his ceiling. Players don't progress when they're 28. You sort of answered your question when you said Gay is more athletic. Gay has the looks of a superstar. He has already developed better shot selection than Miller, he can score from more spots, he's a better ballhandler in traffic, his defense is better, and he's six years younger than Miller. Rudy Gay was second only to Roy as the best player in his draft cl and he's a guy to build around. Miller is solid, but he's not gonna get any better.