One thing to keep in mind is how far away you are for service. Do you have someone close who can/will do warrany service on units they didn't sell. How often are you willing to make the trip especially in the winter.
When you go to pick up the new unit will you be prepared to take your old unit back home if the unit or the walk through is not satisfactory when you pick it up.
We only have had two units. The first was from a small dealer close to us. Problem is he didn't have anything we wanted the second time. Went about a hundred miles away for the second one from a big national dealer. Would not to that again. Next time we would go South and plan on making the dealer hold up their end.