Weekly - What Car Should I Buy Mega Thread

I have absolutely no idea what kind of car I should buy, I need as much help as I can get..

Location: New York, United States (suburbs)

Price range: Minimum doesn't matter as long as it's not a completely garbage car, $30,000 max

New or used: Preferably new, used doesn't matter as long as it won't significantly add to cost of maintaining car

Type of vehicle: Car, preferably sports car, performance car

Must haves: Fuel efficiency, want to spend the least amount of money on gas as possible, 4-5 seats, already good sound system that can be upgraded in the future

Desired transmission: Auto

Intended use: To/from school, to/from work, to/from practice, driving around to friend's houses, showing off its speed/looks/sound system for bumping music

Vehicles you've already considered: Ford GT Mustang seems to be the best car I've found so far after very shallow research, looks like it's really close to or even over my max budget though

Is this your 1st vehicle: Yes, but I already have lots of experience driving and I'd treat my car well, price range I does not have anything to do with this

Warranty: Definitely

Can you do minor/major work on your own vehicle: Not a chance

Additional notes: Dream car for average high school athlete, good sound system, looks sick, room for driving friends around, comfortable and roomy enough. Thanks!

/r/cars Thread