I bought a base model. Hey, what did I know, I'm a noob I guess. In retrospect, I wish I had gotten a Z with the sprts package. Went to dealer to see if I could add the sprts package. Duh? It only comes that way from the factory. Boy did I feel more like a noob after that. I ended up getting some 19" Nismo rims from a seller in Washington. Thay look great. And I can always add the LSD. If you can afford the sprts package, do so. Good luck with the search. Keep us posted!