I don't know about bags that will survive everything.

We have decided to try the guaranteed for life approach to bags. My husband and I are really enjoying our Eagle Creek HC2 Hovercraft bags.

Another post mentions Eagle Creek - just wanted to clarify, not ALL Eagle Creek bags are guaranteed for life, but several of the lines are.

A way around a limited warranty can be to purchase from a company that will allow returns no questions asked, forever. They may not be able to replace a damaged bag, but you can return it and get your money back. REI, LLBean, Lands End, Costco, Magellan and other companies have this generous policy. In this way, you could purchase a less expensive bag, and still not have to pay to replace it if or when it fails.