Hi all, I am currently using a 13" macbook pro with 2.53 Core 2 Duo, 4G RAM and 128G SS drive and am very interested in the lighter macbook air for transporting to and from work. In buying a 13" macbook air what should I expect in day to day performance? i.e. watching movies, internet, processing, and citrix type connection +/- VMware fusion Would this be a step up,down, or lateral? Which of the Airs would people recommend? Thanks in advance to any who reply!