Just got a new HD-DVR for our SD TV. (We moved and I got a deal on the HD-DVR from D*TV. We do plan to get a new HDTV for this reciever but not for a few months.) In the meantime, what is the best way to watch TV- on the HD or SD channels? Pic quality seems to vary among the channels. Also, should I set the "format" to a particular setting to get a better PQ?