I've been averaging over 200 pax flights a year for the last eight years - I bought some Tumi luggage 7 years ago after my previous stuff fell apart...and it's still going strong.
I've recently had each bag repaired by Tumi - (lost feet, cracks in plastic mouldings) - turnaround was quick and the bags are as good as new again.
Downside...it's eye wateringly expensive