Hey all. I'm waiting for the new iMacs to come out and was thinking of buying a Macbook Air to tie me over. I don't want a Pro because I like the ultraportability of the MBA. I was looking at the 11" the other day and thought "Hey this screen isn't as small as I thought". So I'm thinking the MBA would be good substitute until I can get the new iMacs. I'm just wondering what the lifespan is. I'm going to be heading back to College in 2 years and was wondering if I would need to buy a new MBA then. I don't like laggy computers, so if the MBA would be slow in 2 years I would rather hold off on buying one until then. What do you guys think?