Which car is best for me? I am 16 years old.?

I need a car because im getting a job, going to college, and doing high school while starting up a company of my own. I want to buy a used car. I narrowed down my choices to A) 2004-2006 Mazda RX-8 Automatic Mileage: 70,000 and below B) 2002-2005 BMW 325i Same mileage as the mazda. I want something cool but at the same time smart and reliable.