Just wondering what your " go to" briefcase/ messenger bag is. I did try a Saddleback once but found it much too heavy so I sold it. I'm currently torn between using my Muholland and Blue Claw Company briefcases. I don't carry much to the university - just my 11" MacBook Air, a small Levenger Circa binder, a few folders, markers, etc. I stopped carrying heavy textbooks to teach as I simply access them online.