We looked at the Thor with the F-550, before we bought our Seneca. Check the quality, warranty and price closely before you pull the trigger.
We purchased in October of 2015 from Motor Homes 2 Go in Grand Rapids, Michigan. Can't say enough about the salesman, Evan Shephard, and the guys in the Service Department for after sales service and support. Not associated with the company, other than a very satisfied customer. The price difference was well worth the drive.
Ric and Jan Golding
2016 Jayco Seneca 37FS
2016 Chevrolet Traverse
2018 Cheverolet Silverado