User Review: Osprey Aether 70
This pack is astounding in terms of functionality and comfort.
It is a bit heavier than some packs but makes up for it in comfort. The weight difference, in reality, is hard to remember when you're hauling 40-50 lbs of cold weather gear. Trust me, you'll be glad for the extra comfort of the great support systems.
The molded hip belt is absolutely crucial. In addition, the load adjustment straps are easy to get to and actually pull the load higher or lower quite well. I've used it for everything from 3-4 night cold weather (sub 20s) in January to ultra lite speed hikes/trail runs in April and I couldn't be any happier.
My only advice would be to make sure you get some system to organize your gear inside of it. The sleek design is awesome (I use it as a approach pack for climbing as well) but you sacrifice pockets.