In television world, we used to use bespoke aluminium flight cases for equipment, but nowadays, we mostly use something called Peli-cases. These are very tough hard cases made from nylon, or ABS or similar plastic. They are not cheap, but I might invest in one as my suitcase one day.
But apart from broadcasting gear, I would never trust anything delicate to airport baggage handlers. Any case they handle might miss the conveyor belt when exiting the aircraft hold, and will drop about 8' onto concrete, (from an A320). I occasionally saw it happen during my walk-arounds and was once physically assaulted by a baggage handler when I stopped the belt and asked him what the hell he was doing after he had dropped about 4 cases in this way.
So, always pack assuming that your case might fall 8' onto concrete, or off the baggage truck.