I will try to keep this short. I'm typing on a Macbook 1,1 that I purchased back in June, 2006. It has 2GB of ram and a 2.0 Core Duo processor. I'm using about 60/80gigs of hard drive space. Needless to say, it's time to upgrade. I am a teacher and take my computer to work with me everyday, so portability is somewhat important and I am used to working with a 13" computer. I spend most of my time using MS Office and browsing the internet. I also play Starcraft (the original, not 2) and it lags quite a bit on my current Macbook. I do not use my optical drive. What would you all recommend between an Ultimate 13" MBA, new MBP 13" (w/ SSD, either model) or the new base 15" MBP (w/ SSD)? I'd really like to have an SSD. Can I play the original Starcraft on all three of those models with any lag? I would like my new computer to last me at least 4-5 years. I know the 15" seems like overkill for my needs, but it's important to me that this purchase lasts me a long time. Thanks for your help.