hi all, wanted to get input on this. last time I decided not to upgrade, what about now? Question: what sort of performance difference would I see between these machines? I never really notice much slowness with my current machine. Its my main machine but I use it mostly for web/word occasionally parallels and visual studios. It gets hooked up to my two 24" monitors in my lab when I am at work. also does anyone know what a used 2010 11.6" dual core 1.6 ghz w/ 4 gigs ram goes for?