if you're more concerned about looks than overall performance, then go for the 16" wheels...if it's the other way around, then go for 15" wheels.

rugsr, I have to respectfully but strongly disagree with your statement about 15" wheels...from a performance viewpoint, with our cars at least, there would be almost no reason to get 16" wheels over 15" wheels. but we're probably not talking about purely performance here...we rarely are with wheels...