We went from a 1ton dully pulling a 35' 5th wheel, to a 30ft Thor ACE. The ride was better in the ACE, the noise for us was bearable. We found that for weekends the ACE was ok but for long trips it just would not work.
We went to a 07 Itasca Meridian 37' with cummings engine. What a great choice for us. We have had it going on 4 years and almost 40,000 miles. The ride is better than the ACE however DW says that with the airbages its makes walking around while moving a little harder than in the ACE. I am not mechanically inclined so I have the unit serviced once a year. That way I know things are being looked after by folks who know.
Good Luck