I'm looking at replacing an old white Core Duo Macbook with a new MacBook Air and am looking for some thoughts on the speed. I'm a graphic/web designer using a 2010 iMac as my main design computer and the speed is great. The Macbook I have now, as you can imagine, is getting very slow in it's old age. Does the current MBA have the horsepower to tackle Photoshop, InDesign and the like? I love the battery life and size (I'm looking at the base 13" model) but wondered if anybody using a MBA for design could comment as to how it handles these programs? Thanks!