I'm hot on the trail of a messenger bag. I'm liking the size and such of the ID. But here's my question: Which messenger bag would you get that could hold a size 5 Brain Cell, a few books, a sweater, a small power brick, an iPod, a small digital camera, and an external optical drive. The drive's dimensions are: depth: 5.7"; height: .8"; width: 5.7". Also I'm concerned about the safety of the optical drive. The thing costs $250 and doesn't have a nice rubbery skin like the iPod. Is there a messenger bag with like a sturdy slot for such an item? If not, does anyone know if there's like little protective cases out there for external optical drives? What do you all do for your external drives' safety? I won't be going dirt biking with the bag, but I will be in taxis, planes and trains and bags do get bumped and squished frequently. Thanks everyone!