just got the Oppo 103 as well and looking at the same question, from what I gather oppo suggests for better video/audio to plug HDMI 1 into TV HDMI for video, and HDMI 2 to the receiver(BD)HDMI for audio, I also use the FR/FL interconnects of the Oppo 103 to the analog stereo audio on reciever or amp for analog stereo music.
Will probably call Oppo tech to make sure I got it right first
Will probably call Oppo tech to make sure I got it right first