Can someone help me make a decision between the 13" MacBook Air and the 13" MacBook Pro? I am currently using a 2008 MacBook and was waiting for the WWDC announcements to get something new. Obviously, I would love the new retina MacBook, but it is too expensive. I need something portable and some what powerful (but I am not editing films or anything, just lots of hungry applications) I am debating between getting the 13" MacBook Air (1.8 GHz, 8GB RAM and the 512 GB hard drive) and the 13" Pro (2.9 GHz, 8 GB, 750 GB hard drive). I figure that with the solid state drive the Air the Pro are pretty comparable and that the 512 solid state drive is worth the investment. Thoughts?