Hey! I'll be heading back to College in Sept and would like to upgrade my late 2011 MBP. I'm eligible for the school to pay for my new laptop because I have a disability but I am struggling to decide which one I should get. If I get the 13" Air with 8gb of RAM and 512 SSD it's a heck of a lot cheaper then the rMBP with the same specs. I feel greedy asking the school to pay a lot since I don't really need the HD space I just WANT it. What are the pros and cons of each model?