Thanks for the review. I can't decide between the 4800 and the 6300. The goal would be to have the ability to pack out a boned out muley + gear in one trip. As a day pack, I would want it to carry as sleek as possible. I think Kevin mentioned that both size packs compress to roughly equal dimensions. I'm opting to go with the Unaweep to save weight as well, and I believe there's only about a 4 or 5 ounce difference between both sizes in the Unaweep. Finding exact weights and measurements has been difficult. Decisions...decisions...