Sorry, may have not used the correct terms for dimensions... When I was out shopping this weekend I saw that most bags were basically square when viewed from the top, sometimes sticking 8 inches out from your body when put over a shoulder. What I wanted was something more like a messenger bag where it only sticks out from your body 4 or 5 inches but may be 10in wide. As to bag depth, the largest lens I plan to carry is the 55-250 IS which is only about 4.5".
Does that clarification change the recommendations? I'm not tied to Crumpler, I just requested info on that brand because it seems like a lot of people here use them. All the local stores had were Lowepro and, considering that they feel a lot like my lunch bag, seem overpriced...
EDIT: Are Crumpler bags covered under a MAP agreement? Everyone seems to be selling them at the exact same price as the Crumpler web site. Anyone know where I could get a discount?