Tires, to me, are a commodity. We don't get passionate about them unless something goes wrong. Our coach had Bridgestone Duravis tires when we bought it. They've been smooth, quiet, trouble free and show no signs of checking. They're a heavy duty light truck tire. Or if you prefer, a light truck version of a heavy duty tire. I'm trying to recall if anybody has had complaints about them and don't remember any. They're equivalent to the Michelin XPS Rib with the steel construction, and seem to be available at some of the warehouse clubs, at least I hear about Costco having them.
Ours are a "highway" or "rib" style. If you know you will actually need M&S/all season tires, that's one thing. Consider getting them. Otherwise, I believe the highway/rib type will help the RV track straight on the road.