I've put a lot of miles on Osprey’s Aether 70 ($279). It’s a bit larger than the Altra, and excellent suspension, with a hip belt that can be custom-molded in some retailers. It comes with sleeping bag compartment, room top pocket, and plenty of tie-down points and gear loops. It doesn't have quite the build quality as the Arc’Teryx, but it's a great pack for the money.
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