My current setup is a Dish 508 in the living room and a Dish 301 in the bedroom. I'm looking to put a 721 in the living room and and put the 508 in the bedroom and ditch the 301. Would I be better off going with a switch (to utilize 2 tuner capability of the 721 and 1 for the 508) or just getting a Quad LNB and running 3 lines out, 2 to the 721 and 1 to the 508? Also, anyone know which switch I would need for this setup? Any help is appreciated. FYI, the Quad LNB's are going for like 35 ro 40$ on ebay.