I looked hard at Vortex as well, but their higher volume models (i.e. above 4000 cu in) lack the ability to hold your gear (like a shovel, shovel handle, etc.). Their hip belt was the most comfy of all, but their back pad just didn't fit my back either.
In the end, I nixed Vortex cause the pack wouldn't be able to carry what I wanted it to so I could access it easily.
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