Is there a huge performance difference? Battery life difference? Been struggling to decide if ill get the pro 3 or just get an 8 inch win8 tablet. I need a tablet more than a laptop. It'd be nice though to have a laptop but I stilt rather bring a tablet around when I travel. I currently use a Surface RT. I do want to be able to run iTunes, some work appsand a little PhotoShop. Ive been using Remote desktopon RT to do this. Thanks!