Go hang out on the AT or a while. See what the thru hikers are carrying. Ask yourself what's important to someone when they live out of their bag for 2100 miles. Go buy a Vapor Trail. You won't be disappointed...
Unless you like lots of pockets, fancy suspension that adds pounds, removable fanny packs, etc. etc. If you haven't cut your toothbrush in half yet, you might not like this pack. If you have, I recommend cutting the tags out of this pack.
Now that I'm out west, no one seems to carry this pack. They're all surprised that I'd carry anything other than arcteryx; until they pick mine up. Light! Comfortable! Buy one!