X2 on kicking LOTS of tires and spending time sitting around in LOTS of units before you make up your mind. Take your time deciding, there's no rush on any kind of deal, no matter what the sales person says!! There are sellers than buyers out there.
Keep in mind, that when you ask about a specific brand, those people that own it will generally say how happy they are and its the "best" rig out there!! Who is going to admit that it's a lemon?!? :B:@ There may some who say it was a mistake and they got rid of it.
We have had Good Sam Roadside Assistance and it has saved our cookies 3 times and that has more than paid for the 8 years of premiums. Be cautious and suspicious about extend warranties, but that should be a totally different topic when you get closer to purchasing.
Good luck