Is the speed difference significant enough between these two? I've ordered the 1.6, but due to the sinking price of the MBA rev C, I'm thinking of eBaying the 1.6 for the 2.13- The Air w/ the faster CPU have sunk to as much as $1300- shipped(eBay). Any thoughts? Post which one you have, and let me know if you think I should go for the faster one. I will be running BootCamp and VMWare Fusion on it.