Nice to see that you are not rushing into buying the first shiny thing you see.
Selecting a model is actually quite easy once you set the parameters & stick to them.
What is the primary use? Long period travelling for 2 i.e. needing a rolling condo or something for family & short trips?
State parks & such where often there are size issues to deal with or Camp Pack Em In privates which always have space at the cost of a good camping experience?
Looking to do some made for RV events like bluegrass festivals, the Albuquerque Balloon Fiesta, Oskosh Air Adventure etc. where dry camping is a must & large water capacity for more than a couple of days is needed.
Buy a lower quality unit new & put up with all the new unit issues or spend same money for a used higher quality unit with any bugs worked out of it?
Once these basic questions are answered it is time to go look at floorplans. If just for the 2 of you & long trips you will need a decent sized galley with working room & a large fridge & pantry. A big priority, way over how many TVs it has & what the colour of the fabric is.
Once the questions are answered you should be down to just a few models. The hunt is on. Don't be afraid to travel for the right unit. JMO, but the dealer is not that important. Stuff goes wrong when you are far from home & far from the dealer.