Hi guys. I'm new to the forum and I'm on the way of getting my first Mac. I read on the internet that it's difficult to set up 3 different OSs on a Mac Book Air. The uncertainty factor of whether it will work or not is a major turn down for me to get a 13" Mac Book Air. The main purposes of the laptop would be engineering, programming plus sound and photo editing and I want to install Mac OSX Lion, Ubuntu, and Windows 7 on the machine. Regarding the situation, which model do you guys think that I should get based on your experiences and knowledge? Thanks in advance.