3 years ago I had my sights on either a Winnebago Journey or a Tiffin Phaeton, then the only two quality builders who had a 36 foot diesel. I ended up in the Phaeton almost by chance when the dealer who had the Winnie in stock cold not get it to their shop for me to walk through and drive.
We have been delighted with the Tiffin. Our coach had two serious problems, the driver side living room slide out floor rotted and they replaced it at Red Bay on their dime - the change out which required removing the slideout took just under 2 hours!!!. The roof rails also were failing and they spotted in on their inspection and did the work as "good will". those are just two of the stories where Tiffin has come through for us in a manner that has me singing their praise for after sale customer care. It is not likely we will buy another coach, but if I did I would certainly start with Tiffin. Which is not to say Winnebago isn't as good, I have no personal experience