let me start by saying i've done some searching and can't seem to find this same comparison, hence the post. most people are comparing 13" mba vs. 13" rmbp or cmbp. that being said, i am in the market for a new laptop and am in a bit of a quandary. i think the form factor of the macbook air is fantatic, and if there was such a thing as a 15" macbook air i would already be typing on it. my problem is i am used to a 15" mbp, and don't know if the smaller screen real estate of a 13" will be a burden? i have friends that own 13" macbook airs or 15" macbook pros, but nobody owns both. so getting a sense from someone who went from a 15" display to a 13" display is kinda tough. given that i like the form factor of the mba, and if i was to go with a mbp, the retina is a no brainer since it has a slimmer profile and a wonderful display. my core question is, has anyone had any regrets or adulations going from a 15" to a 13" display? i do mostly coding / development, and do quite a bit of music work with logic & various audio apps. i don't think the performance differences will be too much of a factor given that either will be a major upgrade from my '06 mbp. i’ve done quick side by side comparisons but nothing of considerable length of time. i’m not sure how regular long term use will fare on a 13” vs. my usual 15". if anyone could possibly give some personal pros & cons that would be great. any productive input would be greatly appreciated.