i'm wondering if i should get a vertical oriented sleeve (Monolith) or a horizontal one (Brain Cell) from tom bihn. i'm going to use it with my North Face pack, it's plenty big and i can stuff the PB and several books in there for univ and it's very comfy. the Monolith would be ideal, since i can pull out the PB without taking the entire bundle out of the bag, but it's pretty ugly if i ever want to carry only the notebook (with the sleeve). for such purposes, the Brain cell with its horizontal orientation seems to be better. But, if i get the brain cell, it's hard to take it out, i'll ahve to pull the entire thing out before i can get to the PB. and there are no bottom protection, since with the brain cell, the protection would be on the side, and what's the point of that. i need the bottom. what do you think?? or should i get lighter weight sleevs like the Shinza Zeroshock or a Crumpler school hymn instead??