I need some advice from some fellow Apple users. I'm deciding between the baseline Macbook Air 11'' and the baseline Macbook Air 13''. I will use for internet browsing, YouTube, homework (Microsoft Office) and maybe every now and then some gaming - GTA IV and watching Movies on iTunes. Also maybe some Google Sketch-up. What do you guys think? I have a school laptop but would like to buy my own laptop that I can download what I want on it and not stick to the schools rules/regulations/agreement.