Best diesel pusher chassis ?

Most people respond to a question like this with "The BEST is the one I own". I always buy the best. Like's been said, Ford or Chevy. Each mfg has it good points and their less than good points. Chevy is built like a rock, but it's an ugly rock. Ford looks cool but can't hit a basket to save it's soul. Narrow your selection then look for the good and bad on the chassis that coach is built upon. Chassis are but one piece of the puzzle anyway. For instance, Monaco built all their older coaches on their Roadmaster chassis. Their best was/is the RR10R with 10 air bags mounted on the outside the frame rails. Very solid very good ride etc. But, only the luxury coaches, Signature, Executive, Dynasty and later the Camelot, have steel cages. IMO, all the chassis mfg are excellent. It's what's assembled on top of them that makes all the difference when you're driving....Dennis