The downfall of Monaco has been coming for years. They started by not listening to the customers. They had a year or so where you couldn't buy a Diplomat under 40+ feet when the rest of the industry was offering smaller coaches. Then they put the Navistar motor in the coach. Everyone says it works well, but how quickly everyone forgot about the Mercedes engine that showed up for a couple of years and disappeared. This will be the same thing with the Navistar.
I would not buy a coach with a Navistar engine, just because it wasn't hard to foresee that they would be short lived and consequently will be undesirable to later sell to savvy buyers. Lastly, the caps on the new coaches make them look like a "clown car". When someone says they get a lot of compliments about something, it means it's drawing attention and people don't know what else to say! Every time I see one of these going down the road, the back of the thing looks like a funhouse that's going to open up and spit clowns out the back.
I'm sorry to be so harsh for those that own these, but it's only my personal opinion, but I think many others share my opinion as sales figures show.
I love my Monaco and think it was the best bang for the buck when I bought it and one of the nicest coaches on the road. It still looks modern eight years later and it was obviously attractive to others because you see a ton of them on the road. If someone gave me $300,000.00 to buy a new coach today, I wouldn't even look a Monaco coach due to their narrow vision of what the public wanted. My choice would be an Allegro Bus or a Dutch Star, coaches that people want.