Reliable coupe/sports car, good on gas, and cheap? Any suggestions?

im looking to buy my first car, im 19yrs old. I want something that looks sexy, and that is good on gas. my budget is $11000. I really like Nissan 350z's, Inifiniti G35's, Hyundai Tiburon GT se's, Mercedes C class, Honda Civics/Accords (coupes), Mitsubishi Eclipses. What are some other cars that are reliable, good looking, and good on gas? Thankyou.