Leaving aside the RF that the antenna picks up, the term "RF" usually means cable TV, which is not HD. The signal is modulated onto channels which can be selected by standard (now old-fashioned) TV tuners. For HD and audio on a single cable, you need HDMI. It's good out to 50 feet or more (follow
http://www.bluejeanscable.com/store/...bles/index.htm for a good explanation). It carries one signal at a time, so you can't select a different signal at the TV, just the one that's being sent from the receiver. Keep in mind that HD comes in different resolutions, 1080p being the highest commercially available, suitable for bigger screens. Smaller HD TV's work at lower resolutions, such as 720p, and newer ones down-convert to 720p from 1080p. So, if your receiver puts out 1080p, you can use a splitter, as firetrucker suggested, send HDMI to the bedroom LCD panel and enjoy HD with good sound. There are more expensive alternatives for transmitting HDMI over greater distances using CATx (computer network) cables. Although the cable is cheap, the converter box at each end may be pricey.