Buying my first car any

Okay I come from a wealthy family and they have gave me a couple of choices to pick from so I want to know what's the best for gas mileage how safe it is and if it won't break down a lot.

-2005 Ford Mustang GT
2003-2005-Porsche Boxster
-Nissian 350z
-2010 Camero

So what one is the best or if you have any ideas then comment those as well thanks.

If they're so wealthy then why are you looking at used cars?
The kind of research takes time. Try using some of your spare time to check recalls, current used car reviews & reliability reports.

The nissan or the porsche will be the most reliable, only the Porsche will cost you more in repairs if something does happen to it.