BTW, if you don't intend to have 5-6 active viewers, and you don't have all HDTV's, it's cheaper to use a channel modulator to modulate the line-level output of the tuner onto a cableTV channel in your house. I'm almost positive I have 1 or 2 left over modulators as well. This is how I did my house with DTV, TV's in the master bath, kitchen, basement and garage didn't have dedicated tuners, they could just tune in to what one of the other tuners was watching. With it being just the wife and I, 2 tuners guaranteed we could each watch whatever we wanted individually at any location. Perimeter security cams were also modulated onto CATV channels, so you could see who was at the door or coming up the drive easily (yeah, I have some left-over B/w security cams if you want those as well).
