I have been using the same daypack for years now and its a bit tired, though still completely servicable. I'd like to try something a little more streamlined, and since small daypacks generally don't fit me very well (6'3" over 250) I'm considering some waistpack type units. Not really sure how much room I need, but assuming I can lash a jacket to the outside, that should seriously reduce interior space requirements. Some of the units offer nice features such as limited or extensive molle/pals webbing, while others have optional shoulder harnesses to increase weight capacity when necessary (I'm thinking maybe ad hoc UL rig with a sleeping roll lashed on). The two main units I'm comparing are the Mountainsmith Tour vs the Maxpedition Proteus. I like the modularity of the Proteus and the fact I could utilize my USGI canteens, though the Mountainsmith does have PALS webbing on the back to allow perhaps one to attach. That said, it would be just as easy to pick up a nalgene or two as well. The main sway to the Proteus would be that it would be more likely able to integrate onto my CFP-90 ruck while the Mountainsmith just seems like a better overall waistpack in its own right. The other thought I had was to check out a High Sierra Ridgeline (or lager Diplomat). My current daypack is a high sierra and has served very well over the years. Plus the price is a little less shocking; this way if I want to go back to a traditional daypack its not a big deal.