To give you safety in numbers, I just signed a pool contract with a SWG, and it says that the PB will not cover damage caused by salt. I'm also going with travertine for my decking. I can't find any firsthand accounts of people having damage to their travertine from salt.
On a related note, while I've never had a pool, I get the impression that many view the choice of salt vs traditional as an upfront, unchangeable decision. My thought process was salt makes the most sense to me, but if I don't like it for whatever reason, I'll switch to a different form of adding chlorine.