Part of my thesis here is not pushing this particular product (although it is great IMO), but that the differences between examples of this type of luggage are pretty slight. I'm suggesting that most of them are probably pretty good, and 5X to 10X price differences are not justified. but the stiff box might fit your needs, maybe check this out??

So if you like 2-wheelshttp://www.luggagepros.com/travelers-choice-tc-luggage-rome-20-hardshell-rolling-carry-on-upright.shtml





Looks pretty similar except for the 2 wheels. Same internal arrangement. I have not seen one of these, just thinking it might be worth your taking a look at it.