Shopping tires right now. Mine are load range H 22.5.
Michelin X Line Energy Z (replaces OEM XZA3+ no longer made) $5,450 for 8 installed and balanced.
Toyo M177 $4,160 for 8 installed and balanced.
Michelin sidewalls crack prematurely. Mine are now. Warranty is worthless for cracking. Goodyear get rivering on the G670 RV tire. Toyos don't actually have the correct size, so I would have to go to a slightly different size.
Compare prices with and without the FMCA discount. For my Michelin X Line Energy Z - list price was $22 cheaper without the discount. FMCA publishes the discounted prices so you can take it in the store with you and first just ask for pricing without mentioning FMCA and compare it to the discount. You'll notice on the FMCA published list, some discounts are deeper than others.