(-L.) writes:

If you can afford it, hardwood is the way to go.

I definitely agree. A hardwood floor will last more or less forever,
and it's pretty much impervious to anything the cats can do to it.
(Yes, I *have* had to deal with a couple of cat pee accidents over the
years, but it's OK as long as you wipe it up promptly before it has a
chance to soak in.)

-Sandra