Hello all. I am looking to lighten up my load with a new pack. I currently have an Osprey Aether 60 which is a great dependable piece of gear but it weighs in at around 5lbs. I am considering the following packs Z-Pack Arc Haul, ULA Circuit, Osprey Exos 58, and the Elemental Horizons Kalais. They all have relatively the same volume which would make me give serious consideration to any extras I may want to bring along. Thanks and I look forward to reading what you have to say.