Travel. Bring back your stories and experiences. Chicks love that stuff. Believe me. I would rather date a guy who has seen the world, seen poverty, tried different foods, able to speak of different cultures, than a guy that just has a cool car. And if you have both, good for you.
You can buy a man a car but you can't force him to brave the world. That's how I see it. Would rather be with the guy and his worldly experience than the car. I can always buy the Porsche for him later.