After owning a MH with Comfort Drive since 2007 I wouldn't be without it, so that limits it to Newmar and Newell.
If you take CD out of the mix I'd add Entrgra/Travel Supreme to the list. I'd also look at the Monaco/Holiday Rambler line, but I'd look closely. They have been through a few different owners, Navistar didn't seem to do them any favors. The new owners also own Fleetwood, and they have done a nice job by most accounts.
Foretravel makes a nice piece by all accounts, I have no personal working knowledge of them. Country Coach made a nice unit, however they're now an orphan, if that matters to you. Obviously the real bus builders, Marathon, Newell, etc are nice.