I'm amazed at the speed, quality, and portability of the new Macbook Airs, and am seriously considering one for my next laptop. One concern I have is, due laregly to the Air's lack of upgradability, (Ram) is its longevity. How will the upcoming 1.8/2.0 Ghz Ivy Bridge processors in May compare to a 2.4 Ghz Santa Rosa MBP? From what I've seen already in the i5 Air, it seems like they will blow it away. Besides basic word processing and web browsing, I will use it for Photoshop and Lightroom, and perhaps some video editing in the future. Does the Air handle DSLR video files well? Also, my late-2007 MBP is approaching the 5 year mark in June, so I suppose somewhere around 4 years would be a target. Thanks for any advice!