The purdyneat stuff is pricey, but well worth the cost. They have ergonomic features that are great for airline guys/gals, and the wheels can replaced by you with roller-blade wheels. In the long run they are cheaper and easier to own and operate than normal luggage.

The wheel thing is critical, cuz your wheels will get abused and most luggage makers require you to return the rollaboard to the factory or a store, and repairs take 1 week+ and cost $40+. Basically you need a backup rollaboard, plus it is a real nuisance to spend your days off getting suitcases repaired.

If your wheels don't work you have to CARRY your suitcase in one hand and your flightbag in the other. This gets VERY old VERY fast....