Comcast is about to launch HD in my area (Santa Clarita, CA). I have a Sony WEGA 32FV26, which of course, is not HD-capable. If I were to get the HD box and use the component connection, would I get any picture at all? Any down-conversion? I know I'm not going to be buying a new TV anytime soon, but I would like to get the 5.1 audio if possible. Thanks for any info.