Other Bags to Check Out:
Miles the Duffel 40L from Millican is a sturdy little companion for travel (so long as you don't have to walk long distances with your bag!).
The Venturesafe X40 from Pacsafe is a multi-purpose 40L backpack with a ton anti-theft features.
The ATD1 is an expandable backpack you can use for both travel and daily carry. Looks pretty damn good too. One of the best in this category for sure.
The Monolith Weekender from Heimplanet is one of my favorites because it is very durable and simple. Carries all your shit, and comfortably!
The Outbreaker backpack from Tortuga is a solid 1-bag travel pick. I personally prefer the less bulky (and more spacious) experience of traveling with the Tortuga Setout, so be sure to check out that bag too. This Outbreaker, however, has quite a bit more padding and protection around the entire bag, so if you know you'll have delicate stuff inside you may prefer this one.