Which of these cars is the best?

18... You'd be lucky to get any of those. The M3, G37, will be above that price range and maintenance and insurance will be very expensive. If you pay your own bills I'd cross those off. If you are into sporty fast cars with the looks and the flash, I'd go with the 350z. It has the flash and the reliability and it looks better than the Lancer adn the Subaru (especially to ladies).