"Karl B 2 days ago
Have basically the exact same setup but use Goruck gear (http://goruck.com/en/gr1) for backpack/sub-bags and a TravelPro suitcase (I noticed that’s what all the pilots were using)."

That's because TravelPro sponsors bags for most of the airline crews and they get their bags replaced every couple of years. I've had a couple TravelPros and both feel apart in about 2 years - granted this is traveling 40 weeks out of the year. For truly unbreakable luggage my recommendation is either Tumi or Briggs & Riley (Tumi is probably the more well known brand; my personal preference is Briggs & Riley based purely on personal aesthetics). As Rands said you will pay a little more but the premium is worth it both from a durability as well as peace of mind perspective.