I am beginning a search for a used 28-30Ft Class C Motorhome - have never owned one before. Can anyone help me sort out model/brand quality? For instance, who would be considered top of the line, middle, etc? If I were looking for a car, I would go to Consumer Reports to learn, but haven't found a similar service on RV's. The model/brands that interest me most at this point are Gulfstream and Dutchman.