The current state of the art portable dome for Dish is the Winegard Pathway X2. The capability of using either the three western arc or three eastern arc satellites adds more flexibility to your aiming options, but unfortunately, there is no permanent roof mount option for that model. For roof top mounts, as said previously, the RoadTrip Mission would be a good alternative, and it's available in either both stationary and in-motion models. It does have the typical dome limitations of course, also as previously mentioned.
