Eagle Creek's EC LYNC

The EC LYNC might be the first pack that can both roll through the airport and be carried comfortably on a day hike. The wheeled hard-frame on this 4-pound 6-ounce hybrid pack can be separated with a snap, allowing the back to transform from airport roller to backpack or hand-held duffle in the time it takes you to park your car.
[$255-$300; eaglecreek.com]