64GB would probably be more than enough for me to stash OS X and my apps. A 1.8" for the MBA is £600 here, but anybody know how much one could find a 3.5" 64GB SATA drive for? I've been poking around, and have only found 2.5's. I really don't want the noise of a Raptor, so this seems like a perfect solution if and when one can be had at a reasonable price.