Hey, I'm considering picking up a 13" Ultimate MBA to replace my early 2008 MB Pro. My CPU uses are quite minimal, and I plan to use this machine for basic tasks (word-processing, web browsing, listening to music). With Sandybridge release around the corner, my only worry is that the C2D will become obsolete soon and will diminish the longevity of the MBA, which I would like to last for at least 1-2 years. Is it better to buy now, or wait a few months for the refresh? Thanks!