I am thinking of buying MacBook Air 11" with 512GB SSD because I can use it for Target Display Mode with my iMac 27". But at 512GB SSD, the price difference is not that much (I mean, affordable) between rMB and MBA 11", then I think "Why not the greatest model?" Would 256GB enough to run Parallel? I will be running Visio and Office on Windows 8.1 within Parallels. If 256GB is OK, then I will be more incline to by MBA. Thanks.