I know I posted posts previous in the past this year about getting a 13" but figured since I am able to afford another 15", I'll look into that. Main use is for graduate nursing school and home. Won't be doing graphics intensive work except for the usual seldom iMovie editing to make videos or slideshows. I use a lot of iWork, office for mac 08, internet, email, pandora, itunes, etc. I have a 2009 15" 2.66 ghz MBP. Some main points I see whats good in upgrading is the graphics card switches automatically and I don't have to always log out and close down my programs I already have open, its a little faster than the one I have now, option of getting glossy high-resolution since I'm mostly indoors with it, and battery may last 8-9 hours (is this common?). When I'm at starbucks and school just doing minor web browsing to search for research articles in Pubmed and writing a word document, it shows I get almost 6-7 hours at full charge, but most times it shows between 4-6 hours. I did get many times where it showed that I had a constant 6 hours . I also see that it may be useful to have a few more hours of battery life if you're on the go lets say from starbucks (assuming all the seats and outlet plugs are taken up) to the university campus. So is it worth it to upgrade or wait?