i would think the main reason why a lot of people give up on ttheir crumpler bags is because if you look at the demographics, poly or jc kids would be the major group that buys crumpler bags. and the messenger bags like the western lawn and the barney rustle blanket are not really very friendly with paper and books because that "curving up" problem arises.
but what you can do is to look into their laptop series. those are more "rectangular" so they can hold your documents and books better.
personally, i am still in university so my most often used crumpler is the laptop bag, The Skivvy. I have no laptop, but it holds my notes and books great
