gonk - Thanks for tolerating my "thinking out loud". The more I think about this, the more I like this option. As an added bonus, I won't need the 3 channel amp anymore, and the proceeds from selling it will cover the cost of the 990.
With this set up, I could send the Zone 2 audio from the 990 to the receiver, and use Speakers A and B from the reciver to supply sound to the workout and party rooms. Or, I could simply send the RCA/Analog audio outs of the individual sources directly to the receiver.
The other option is to try to route an additional set of component cables to the 27" LCD, one connected to the DVR, and one to the Oppo (would not be easy to do, but I am sure it could be done). While this option works well for the video, it still leaves the audio with shortcomings. Also, I am really not in the mood to spend any more money on cables.