I'm not too keen on Forest River (Berkshire Hathaway) which is a solid company, but they have 48 product lines (and usually 8 floorplans within each line) Too big and too many pokers in the fire for my liking. I'd say Northwoods MFG (Nash, Arctic Fox), OutdoorRV or Lance are going to be your 3 biggest and best options. I don't think Jayco cuts it when it comes to their supposed "Polar Package" I have the Arctic Fox 22G but it's heavy and kinda clunky. I'm thinking about a Lance for the lightweight and true 4 Seasons Package. Don't know if I'll pull the trigger or not.