My laptop is a Dell 8600, which I now carry in a #2 Brain Cell. I'd like to put the cell into a bag, but I'm not sure whether to go for the Super Ego or the Seattle Messenger. I'm a college professor and I haul around a few books and the occasional manuscript. I don't need to carry everything in the laptop bag, but I wouldn't mind carrying what I can. The Seattle Messenger seems to have a greater volume. What would be the advantages of the Super Ego--besides aesthetics? (I don't particularly need a lot of pockets.)