First, I would buy an All Terrain every time.
It looks like my post is late to the party... here goes...
I had a FWC Grandby. Great camper. Loaded. I had a full-size GMC Camper Special at the time...
Bought a new 2002 Toyota Tundra Limited TRD... found out that Marty, et al were starting up a new shop so I went to visit. I ended up purchasing their first Panther model and still use it 15 years later. Just took it out last weekend. I got the shell version with some simple mods. The Grandby I had came with everything. I learned I didn't need everything. I cook outside, live outside and needed the camper to sleep in, store stuff, keep warm and day when needed and to keep my Dometic CFX frig. I had them put the roof vent in... wire for solar ... first one ever... couch... front and side... large windows on both sides and a small cabinet with a heater...to go along with the typical long cabinets over the windows.
I had a couple of problems... I run into things off road. They were always great and helpful and the service is excellent. I haven't talked with FWC since Mike Duncan and Ben left but I'm sure they still make good campers. My only complaint with them was that they were just too busy. I like the small family feel.
Anyway... feel free to ask me any questions you have... good luck... it's a great way to camp