I can't decide on a car?

I want a car that is sporty and cly at the same time and it has to be on the small side. My budget is around 15-20k. I'm a freshman in college in Atlanta. I have been looking at carmax because i they have prices that I can afford. I come up with about 5 possibilities but I can't decide. -2005 mercedes c230 sport -2005 acura tsx -2006 audi a4 -2005 chrysler crossfire (my favorite but it only seats 2) -2003 infiniti g35 coupe -2004 bmw 3-series (coupe or sedan) and -2008 honda civic coupe(only as a last resort) I would really appreciate any feedback