as far as the house goes....
the concern about reliability I think mainly comes form the components (fridge, AC, furnace, etc...)
all of them use the same suppliers, so it really doesn't matter on that end if you go with Winnebago, one of the Thor brands, Forest River, etc... pretty much any of them are going to be using the same furnace for example.
It's more about finding a floor plan you like in your budget.