macbook air 11'? I'm basically after a macbook air and going to be buying one next week. the thing is though, i'm wondering if i will notice the difference in performance between the 2010 base and the 2011 base. My main usage is basically going to be web browsing, watching 720p video, listening to music, some microsoft word and auto cad (no major work as i have another computer). considering I am only going to be using it for light usage plus some gaming, would i really notice the performance difference?