We just traded a coach with new tires and I elected to use Hankook AH-12's when I got them last June. There gave me a very nice ride.
The dealer included a new set of tires on the coach we just got and I told him I would be happy if they put Hankook AH-12's on it if they wanted. They told me they always use Michelin so they put XXA2's on it. It was their money so fine with me.
I think as long as you get a decent tire, inflate them to the proper level based on your actual axle weights, and otherwise take good care of them, you will be fine.