We had two toy haulers prior to our first DP, a 42P Providence by Fleetwood. It was a good learner DP.
Looking at our second we debated between the Tiffin and Newmar. Heard nothing but WONDERFUL things about Bob Tiffin and his facility in Red Bay, AL. We ultimately decided our second, and probably last DP would have a large bath in the AFT of the coach. So liked the plans with Tiffin and Newmar had those. It really came down to price and quality.
We had some close friends who had just bought the 4369 Dutch Star in 16. We liked theirs. My husband does 99% of the driving, and we test drove, Allegro Bus, Entegra Anthem, and the Dutch Star. It ultimately came down to the comfort drive and steerable tag axle for my husband. We went with the 4369 Dutch Star and have NOT been disappointed. The half bath and rear bath are awesome. I am a bigger girl. I enjoy the full wall slide and two opposing slides in the Dutch Star.
I STRONGLY recommend on the test drive to walk around while the slides are in. As I said, I am a bigger gal and if I was to get too much bigger, maneuvering in the coach while in transit would be a pickle.
Lastly, GET an extended warranty! Since you are looking to buy used, you might need that to fix others issues. Money well spent.