Do Not get the RS carry-on. I have the new RS 20 inch rolling carry-on that I bought last summer 2013 and have used it for four separate trips since then, 1 domestic, 3 international.
The first trip the bag refused to stand upright. It kept pitching forward hard and fast everytime I stopped. I could Not let go of the handle, which became a bother because I need both hands at times. It was exhausting picking it up off the floor, and everybody hated me, the bag hit dogs, children, and toppled newsstands.
I emailed RS CS from Italy and they emailed back to zip up the expansion and reduce the weight, even though total weight was below max allowance and airline rules. I left nearly half my clothes behind at the B and B, but I kept my 2 paperback books. I closed the expansion. The bag continued to pitch.
In September, I left out the books, and had a total weight of 17 pounds, which was still too much because I could Not maneuver the bag out of the way. It was so heavy and unwieldy that it was exhausting moving the bag to a safe place. It's like the wheels vanish and I'm left with a heavy, out-of-shape, lumpy bag and No control.
The kicker was when I got very ill in Rome the day before departure and 17 pounds felt like 17 tons. That bag has only 2 tiny wheels, placing the whole weight of the bag on me. And I could Not drag it. Needless to say I attracted the (unwanted) attention of the Airlines which then monitored me for the whole trip.
This last trip in November I kept the total weight down to 15 pounds, and the bag was better to manage at that weight.
I'm looking for a 4-wheeled carry-on so the bag can carry its own weight. I'm leaning toward the 21 inch Lipault carry-on, all handles and wheels are included in the 21 inches. I have a 4-wheeled bag I check that I bought at Roma Termini and I just love it. It carries its own weight and just lightly touching the handles moves it along. I need the same experience with my carry-on.