As I await my new 15.4 MBP, I'm boggled by the vast options in bags and cases. I'm going to be moving around and traveling a lot with the comp (including air travel), so I need a very sturdy solution. I'm also going to be using it in school, so I want a solution that a) looks good, and b) will work with books/notebooks/etc. I'm leaning heavily towards a messenger bag + rigid sleeve combination, with the main sleeve contenders being the Axio Hardsleeve, Shinza Zeroshock, Booq Vyper, and Crumpler School Hymn. Are any of these sturdy enough to use in a very flimsy messenger bag, or to stand up to a loaded backpack? (I use both currently) I was considering getting the Crumpler Dreadful Embarrassment, along with one of the sleeves (I know the bag already has a sleeve but I'm paranoid), but is the extra protection of a sleeve + padded bag necessary? My dead PB used to be carried around in the flimsy incase sleeve, which I stuck into my backpack/unpadded messenger bag, and it received all manner of dings and dents and knocks: I don't want that happening again.