Agree with Dutch Star Don. Regardless of which coach you choose, make sure you evaluate its livability beforehand. Some of the newer floor plans leave little room to walk to the back of the coach when the slides are in, just as an example. How you plan to use it, how much you plan to drive it, etc. should factor into your decision.
All the manufacturers have quality control issues, some more than others. However, some seem to do a much better job of dealing with the issues. While none of us has objective data to offer, opinions can be offered. IMO, Newmar and Tiffin would be higher on my list than the others you listed.
2019 Grand Design Solitude 384GK 5th wheel. Glen Allen, VA