Everyone has an opinion. Some people hate PP, others love it. I think their quality is OK, and being one of the major brands, parts will likely always be available, and there is a good possibility ( no guarantee ) that if 15 years from now you would like to change from today's lovely? satin nickel or venetian bronze to the then-popular chartruse, then updated trim may well be available.
If you ask the opinion of most plumbers on these forums, they probably favor Delta as their number one choice. I would get whichever one your wife is in love with!