I just got a new MBP, and I'm shopping for a backpack for it. I really like the Booq Mamba Pack and the Crumpler King Single, and I might be willing to spend the money on them if I think they'll hold up for a few years. I was wondering if any owners of these bags might offer recommendations. I'd specifically like to know how well they would protect my computer and books if, say, I got caught in a rain storm, or if my backpack fell off my large suitcase at the airport.