Sitting here in a 14 Thor Challenger 37GT. Found one with only 3,200 miles. Of course it had the larger wheels and longer wheel base so it road much better. The Ford chassis/engine was a 2014 and the coach was a 2015, but it was originally titled and sold May 2014, so I have original factory 3 yr/36,000 warranty until next May.
It is a nice coach and drives like a dream. Since it was used I got it a few thousand less than I was going to pay for the shorter new Precept. I am a happy camper!
Thanks to all for suggestions and advise.