Honestly, I switch to travel pro for all my luggage a number of years ago and couldn't be happier. I have a carry on and a smaller roller over night. I beat the hell out of my bags and they have never let me down nor have I found anything that makes me think the quality just isn't there.

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If you want to spend a bit more, I've heard good things about pelican luggage but that does get pricey. Also, if you want truly bullet proof and are willing to sacrifice convivence check out saddleback leather you'll never have to worry about durability with those bags.