I'm the type of person who would like to carry my laptop around whenever i can. But it kills me that i might regret getting the 13' and wanted the real estate. Also the dedicated graphics might be a big plus if and when i decide to do some video editing or something that will require heavy graphics. But then again, it might not happen so i would be stuck with an overkill laptop that is too heavy to carry and regret getting the 15'. I have the money to get either one so it's no problem. This is also my first mac. I used to have an IBM T40 14' that weighs 4.9 lbs which i think is not so bad for the size but the weight somewhat sucks. I also have a great (somewhat high end) desktop that i use at home which i wouldn't think of using the Mac since I have a 24' inch monitor. So yea, i'm very undecided right now
