wondering if anyone has gone from a 13" to a 15"? although, I love my 13" I find my self wanting more screen space, little more RAM and more rest space for my arms.....I travel maybe once every 6 weeks or so. Lots of coffee shots or just at home on the desk, so don't think I will have a problem. I do a lot of excel spreadsheets, medical modeling, so at times miss larger screens, not a must have but a very nice have! Have someone who will give me basically what I paid for my 13", so covered there. And not sure I want to pay $3,000 for the new 16" MBP either... would just get base model 15" for $2399 plus student discount and beats so a decent deal... any thoughts?