North Star:
Thank you very much for the links. Some great stuff in there. I did get things hooked up last night and did some limited listening. I guess the jury is still out on whether or not this is the way to go. Things did seem a bit shrill, but will keep at it this weekend to see if things settle a bit. My problem with using the Outlaw 990, as I understand it, is that it does another A to D to A conversion to apply the channel trim, delay, and bass management settings. But it may still sound better this way.
On the oppo, I did use the dedicated stereo analog outs (RCA) along with the appropriate stereo settings, and this seemed to work out OK. Nice unit, though!