I have a DirecTivo now and will soon have a DirecTV HDTV receiver. If I get an oval dish with two dual LNBs and the multiswitch, how many cables do I have to connect to the satellite to to use both tuners in the DirecTivo and the HDTV receiver? How many for only one DirecTivo tuner? I have to make a long (150 ft) run to the dish, so I'm trying to minimize the number of long runs I have to make. Thanks.