Knowing it's for shorter trips is a helpful piece of data. To have any hope of a helpful response, I suggest that you talk about what you prioritize in a pack: cost, durability, weight, any particular features --- you can't optimize for everything, and knowing which factors are most/least important to you is necessary for anyone to give you useful input.

Having an idea of what min/max weight loads you might anticipate carrying in the pack could be helpful too, especially if you're thinking in terms of pretty lightweight packs.
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Brian Lewis
http://postholer.com/brianle