Having played with both, and having own the 11 inch model since that size was released last fall, the 11 inch feels a lot smaller when you're talking a bag, carrying with you, etc. And while I have a Mac Pro with a 27 inch monitor at home, I don't find it constraining to use my MBA for the tasks that it does a good job at -- right now my Mac Pro is a room over and I'm typing on my MBA. So, personally, I prefer the 11.6 model, but it really depends on the person.