If you are just moving camera gear, pretty much anything will be fine. I seldom move only camera, tho. For a wheeled case, nothing from ThinkTank compares with the hard shell Porter Case.
On uneven surfaces, the bigger the wheels, the better. It really does matter! Look at the size of the large wheels on the Porter Case :thumbup:, look at the little wheels on the ThinkTank. :thumbdown:
The more stuff you put in a case, the heavier it gets. You want the center of gravity lower for stability. Every luggage/case manfr puts the handle BELOW :thumbdown: the weight, creating the least stable performance for the case. On the Porter Case the handle is ABOVE :thumbup: the load. It is extremely stable when fully loaded. I have been dragging wheeled cases around the world for 25+ years. Nothing I have ever used, case, luggage, or otherwise is as stable as a Porter Case. The only thing better is a personal Sherpa. :thumbs:
The Porter Case is popular with wedding photographers because of all of the other equipment they haul around. Like I said, I seldom travel with only cameras. I got other stuff, other bags. The Porter Case also functions as a dolly that will carry 200-lbs of whatever you want to stack on top of your cameras...protected in a hard shell case. Look again at that link I posted above, see the pic near the bottom. It is the same case acting as a dolly. No other case can do that.
If you just want a wheeled case to move cameras, it would be much less expensive to get Costco Kirkland brand carry on luggage, and design your own internal padding. Kirkland luggage is top quality stuff, and only costs around $110 from Costco, or buy from costco.com. I forget who manfr's the Kirkland brand for Costco but that exact same carry on case retails for around $430 with the mnfr's name on it. Nonetheless, it is not as stable as a Porter Case when rolling, but then neither is any other wheeled case.
ETA: A couple of months ago when I checked in with the airlines I was asked to have my carry on case weighed. With fuel costs, etc, airlines are getting picky about weight, what needs to be checked as "extra baggage" because it generates a surcharge. So, how you carry your cameras and what lens you take, what you want to check in and what you want to carry on may need to be a consideration.