I have been debating (like many others) the base model S vs. performance. The problem for me is that I want 19" wheels, but I want some of the other appointments of the performance S. One issue is the leather option. The website seems to point out a major difference between the leather "throughout" on the performance S and the leather seat option for the base. Can someone who has seen the difference post about it? I don't want to spend this much on a car and have it look cheap inside. I would upgrade to performance to avoid that. However, it seems a waste for me otherwise since I want 19" wheels and don't need 0-60 in 4.4 seconds. I am a moderate driver my nature. Thanks.