Some of the issues with the rMBP's are starting to scare me, with some forums indicating they want to wait for the next version's processor (Haswell, I think). As long as the HD is SS, the only real difference is the screen from everything that I read, one that most websites aren't even configured too.
The Air configuration I was eying was the
13", i7, 8GB, 256 SSD - $1699
The Mac Pro configuration I really liked
15" base model, where I was going to upgrade myself off crucial (RAM, SSD) and add the high res glossy screen.
I've spent my entire evening reading over information, aside from my hour break to watch Breaking Bad.