We had a 32' Fleetwood Terra gasser with the 8.1 Chevy. It had a ton of power and handled well. I added extra insulation to the doghouse which made it reasonably quiet. I dumped the coach because of the brake issues on the Workhorse and the toilet had a funky offset tank that always plugged.
We went to a 36' DP with a 400 ISL that was a rocket. We kept it for nine years. I loved the power of that coach. Our current coach is 5K heavier, taller and dragging a tag. It's got the torque, but isn't a rocket like my previous coach. With all that said regarding power, I think the DP handling in adverse conditions is a biggee that is hard to give up.