Speedbird, as you say yourself, the wheel issue is the same with all the bags. Well some are worse than others, of course. Four-wheeled spinners are more prone to breakage than 2-wheeled rollers, especially if the rolls are encased. The rolls are then also easier to replace because it is essentially an inline-skate wheel with axle. Forget about replacing a proprietary Rimowa spinner wheel on the fly.

If you really want something very reliable I suggest abandoning exterior wheels and going with a cart system. You take an ordinary suitcase without wheels or with just a pair of roller wheels. Then you take a luggage cart to transport that. This way you have redundancy in case of a roller suitcase transported with a cart. Or you have no redundancy but the luggage cart won't be in harms way because it will either serve you to wheel around your hand luggage or you will put it INSIDE the checked bag. Yes, that is a little inconvenient but it works.

Then you need a piece of luggage that is very sturdy. I'd look into Briggs and Riley and the better Eagle Creek lines. If you want hard case, think of something as light as a simple Samsonite Oyster or comparable Delsey. Or go indestructible and choose a Pelican case (heavy, though).

A Pelikan case sans wheels transported on a cart that is always with you would be the no-compromise solution. Not very elegant, not very light but rugged and smart.

Till