The Best Rolling Luggage
BRX Excursion Backpack and Explore 19-inch Upright
The backpack clips onto the front of the upright, so you can check two pieces as one. Hardware for the pull handle is outside, leaving more space inside for your stuff. Lifetime warranty. Also in 22 and 25 inches (upright). Both are carry-ons (the back-pack fits under a seat).
To buy: Backpack, $120; upright, $260: briggs-riley.com.