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Just as a heads up. If you go to REI's outlet page they've got Deuter ACT Lite 50+10 packs on close out for just under $150.
Those were some of my favorite packs when I was an /out/fitter because they sizing is fully adjustable and they're pretty tough. They're very common as rental packs for that reason. Not the fanciest or lightest, but tough and versatile.