I got the Eagle Creek for half off at the local AAA travel agency. They were dumping it in favor of another line and I had to make a quick decision. Mine is the 20", but it has the zip off daypack for extra room. The other choice was a 22" expandable with less total cubic inches. I travel very light also. If I didn't have such big feet I could do with 1/3 less! (I like an extra pair of shoes).

I'm getting too old to backpack, especially when I carry-on.