Don't take this wrong kid, but you bought a base model. Most crossfires come with Leather and Heated seats. What do you mean more bang for the buck? Your going to go 4k in the hole. Your young, (granted I'm not much older) don't put yourself deep in the hole this early in life. It seems to me you might have new car it is. Try to save up more for a down payment so you don't go that far into the hole, but if I were you, and in your situation the first thing I would do is ask my parents. They're right 90% of the time and if you still get the G35 I wish you the best.