Hey folks, I am looking for a new pack, and was wondering if you could recommend a make and model. It needs to have the following:

65 or 70L
Removable top
Lightweight
Big enough to fit bear canister
Sleeping Bag Compartment
Comfortable


I realize that comfort is subjective, but I just want to get an idea of what everyone is using, get me looking in the right direction in today's market. Thanks in Advance!