Do not get one of the rollers with the outboard wheels. First of all the airlines store them on the side, ruining the bag. Because of that, I also had one wheel broken off. Try to get the older design with the inboard wheels.
2 more hints: be absolutely sure of what your bag weighs. I had a Southwest airlines scale weigh my bag 8 pounds heavier than it actually was; in fact it passed weigh in on the way there with the same balls in it!
Also, curbside baggage check in seems to me more lenient with the weigh situation.
Hope this helps you
Also, Buddies has the old design storm bags without shoe pocket for 49.95