I basically only do excel/word, surf the web and watch movies on my computer and now i'm in the progress to chose between 13" or 15" hi res. What do you suggest? Is the text to small when you surf the internet on 15" hi res? Right now i got an external monitor (22" 1680*1050) but i'm looking to get rid of it and use MBP as my only computer. I spent quite alot of time in front of the computer if that matters.