LOL just Titanium...no Platinums as far as I know.

Honestly, for the money "upgrading" on stock Infiniti wheels is not worth it IMO. Spend that money on a nice set of aftermarket wheels, and lets face it, G35 coupe rims are not gonna be cheap. Might as well do something that looks nice, and fits the car (personality, as well as physically, cause btw, the g35 wheels will stick out cuz of different offset).

Reminds me of lamer Taurus owners who buy Sable chrome rims and consider it an "upgrade"