I've seen a couple of threads suggesting that the 2010 11" mba actually runs less hot and gets better battery life than later models. Is that true? Will that still be true with Mountain Lion? I'm trying to figure out the best value for me and I think that question might be the difference between going for a 2010 and a 2012. These are my thoughts and I'd love to hear your reflections: My use doesn't depend much on processor speed (I do mostly surfing and writing/office applications). I do keep the computer on my lap a lot and notice the heat, and longer battery life is very convenient. I use a lot of browser windows and apps at once so more RAM is definitely better, but I wonder whether 4gb would be sufficient. It seems like prices on ebay are quite good for the 2010 model (including 4gb ram and 128gb ssd), as low as $500-650. But presumably the battery life would be worse and it doesn't come with the one year warranty that would be included with the $789 refurb from the Apple store. A new 8gb ram 128gb ssd 11" from the education store, plus apple care, comes out to $300 more than the refurb 2010 plus applecare, and a $200 difference if I count the app gift card (because applecare is also discounted). Though if I bought the refurb, I might not buy the applecare until a year from now when the price difference wouldn't hurt so much, or not at all if I decided to sell it and upgrade. (Still, I guess the resale value might make be negligible in another year or so, considering where it is now). Is the newest version worth the difference in cost? Thank you! I realize I'm asking a lot of perhaps fairly repetitive questions but this is a pretty significant purchase for me (my last mac was an iBook G4) and I really appreciate this board's help and patience.