I currently have a Legacy dual reciver on my dish. I want to add a Dish DVR522 to go with the 811 HDTV reciver. I also have a old Legacy reciver I would like to keep using in the kids room. Since I only have 2 outputs on the dish.. one going to the 811 and one going to the old reciver. What choices do I have for adding the DVR522. Someone told me I could use a Dish pro plus twin LNBF.. and use one cable to run the dual reciver DVR. I thought on that I would need a switch.. not sure. Or would I be better off going with a Legacy Quad and running in the extra lines?