Nick, the DTV HD Satellites are much lower in the sky than the SD ones. Our dish - which was already on the roof - had to be repositioned also. It ended up on the chimney (which is a framed-around-a-pipe thing, not a brick thing). We decided not to care if it looks stupid. You can't really see it from the street anyway since it's on the back side of the chimney. Plus, I'm always spoiling for a fight with the Homeowners' Association.
There's a guy on DBS Talk who has a methodology for getting around problematic trees by using multiple dishes. Not a "standard install" for sure, though.
