I have a 13" Unibody MacBook - I don't remember what year, but these only came out for a little while. I'm in the market for a new MBP for battery life mostly, but the SD reader and faster processor will be welcomed. I'm not sure if I want to stay with a 13" or go to 15". If I go 15" the primary reason will be for high-def resolution and anti-glare screen. I'm not crazy about the size of a 15", but I want to be sure the anti-glare screen - which I had in a previous MacBook - and high-def screen aren't features I will miss/want. Obviously, there is a considerable price difference here, but what do users who have these think? What I do on this laptop does not make the increased power an issue. I'm not doing CAD or anything heavy. I think I'm going to delay this purchase for a couple of months to hopefully be a cheapskate and get Lion with the laptop. Thoughts?