Macbook Air or New Pro?

I've been waiting for this day. Now I have a terrible decision: Portability and more storage, vs retina display (!), better graphics and performance.

They are both around $2000, which is at the limit of my budget, and have the same ram. I can get 512gb on the air for tht price but only 256 on the pro. They also have basically the same resolution in terms of size, the air will just be pixilated I guess.

I will be using it as my primary computer and will take it to work every day (Highschool teacher). I like the portability of my current 13", but it is kinda heavy. The new pro is a little lighter but larger.

Damn it apple, why cant I have my 13" retina air?!?!?!

Any thoughts would be appreciated.