Anything diesel 350 dually long bed 2011 or newer should be fine. All brands in my mind have plus or minus the features and issues all wash out the same. Mechanically I have heard all sorts of stuff about them all. A good inspection by a trusted mechanic and afterwards the upkeep will be key on a smooth and problem free ride. My next truck will be a dually but plane jane on the inside. Fords from what I hear with the cab height is you might need to lay down a piece of good quality foam board to increase the height of the sleep area over the cab.