If u need ur parents permission to buy a car then u don't need an s2k. There are many things more worthwhile to spend ur dough on. Remeber that 5 yrs, a lot can happen in that time and the credit will not just dissapear. I once thought I could afford a celica gt-s when I was 17. Sure I could have paid for the monthly payments then, but if I had those payments now that I'm 20 and in college I would be struggling.

DUDE u don't need an s2k now. Save that money. Go travel the world or do something fun.