What every anyone owns is generally the absolute best. The trailers you are looking at are in general considered entry level 5th wheel units. Pick a dealer that has a good reputation in your area.
Next, make sure the truck you have or will get, has sufficient GVWR and GAWR to carry the pin weight of a fully loaded trailer. DO NOT use the dry weights published by the RV manufacturers.
You can get a much better deal on a gently used 3 to 5 year old higher end trailer and be better off financially than an entry level new trailer.
Ken