I went with the Briggs & Riley ZDX 26” ($423 at Costco) over the Travelpro Roundtrip set ($210 for two pieces). While the Roundtrip has a limited 10-year warranty on defects in materials/workmanship, the B&R offers a true lifetime warranty that even covers airline damage with no questions asked.
My previous B&R 29” has lasted 10+ years of heavy use and is still going strong, working out so far to about $30/year over its lifespan. The Roundtrip is fine for occasional travelers, but for frequent cruising and international travel, the B&R’s durability, superior construction (ballistic nylon vs. hardside), and comprehensive warranty made it worth the extra investment. Between my two B&R suitcases with lifetime warranties, I may never need to buy luggage again.