Air or Pro?

I've decided to replace my pink Vaio lappy (it's more than 3 years old already), but since I don't like the new Vaio series in pink that much, I'd go for the next best thing...a Macbook.

But then I'm torn...should I get an Air:

or a Pro:

I like how thin and lightweight the Air is, but for almost the same price, the Pro is more powerful. Waaah...decisions, decisions!