I have a 2018 Winnebago Navion 24V, purchased brand new, and we like it, at the price we paid for it. Winnebago has been making the class C on the Sprinter chassis for over a decade and they've pretty much got the bugs worked out in what works and what doesn't. True, that everyone is starting to offer the Sprinter based chassis, but not all have been doing it long enough to make it work like Winnie.
One thing to do before you look at price, and fit and finish, and other options, make sure the unit you decide on can haul all the stuff you plan on taking with you, including you and your family members. The Achilles heel of the Sprinter based class/type C motorhomes is their OCCC. Coming from a 5th wheel, you will notice the difference. I think the ones with the full wall slides, and any that come with electric/hydraulic levelling systems are the most "OCCC challenged" makes/models.
