I'm someone who generally appreciate portability over performance, within reason of course. My current setup consists of an iPhone 4S, iPad and MacBook Pro 2011 (i5 2.3 GHz/128 GB SSD/8 GB DDR3). In generally, my iPad suffices for 70% of my computing needs, and the MacBook Pro is great, but it's a bit heavier than I like a laptop to be. I've been eyeing the MacBook Air 11" (i7 2.0 GHz/128 GB SSD/8 GB DDR3L/$1349) for a while now, and with the new upgrade, I'm thinking of switching to it. So, I have a few questions: 1) How much do you think I can get for my current laptop? 2) How much of a performance difference do you think I'll see? I normally use my computer for surfing, minimal graphic design, document preparation and some statistical analyses.