I've been eagerly awaiting the announcement of the new haswell MBAs for the last two months as I need a new laptop, and my hearts set on a MBA. The trouble is, having now seen the new specs, I'm unsure wether it is powerful enough. I know about the megahertz myth and all that but will a 1.3 ghz i5 8gb ram 13" be enough for my needs or will I need the 1.7 i7?? My uses are: Basic Internet, Netflix, word processing, photo editing in iPhoto/apeture (very basic- no raw files), maybe a bit of iMovie, occasional light usage VMs and 3D modelling in sketchup with rendering add-on (building architecture, not professional but design houses for a hobby!). Also, in the future how long will it last and will I be able to run more advanced 3D programmes like AutoCad?? Any advice would be great!