I am in the market for a new pack and have narrowed my choices to 3. The Mountainsmith- Ghost 04, Granite Gear -Vapor Trail, and the ULA -Fusion. Does anybody have any experience with any of these bags. I know the old style ghost had some issues. My base load is between 15-20lbs, which is below any of the max load rates, so that is not an issue. I would like to know about comfort, durability, pros cons etc etc. thank you in advance