Mike, I just opted for Toyos over Michelins. My tire size was different from yours, though. The Les Schwab in Junction City, OR, (aka Bob Dickman Tire) has been doing motorhome tires for a very long time, since they were in the heart of Monaco, SMC, and Country Coach country. They should be a good resource.
Apparently Toyo quit supporting their tires on motorhome's some time back because they were meant for trucks, not coaches, manufacturers were putting them on factory coaches, and they were wearing out. They designed instead a new tire specifically for motor coaches. In our case it is the M144.
You might run it by that Les Schwab and see what they say.
Joel