All the OPPO owners might be folks who have chosen the OPPO players over the PS3, or they have no interest in gaming in the first place. Many of them are very interested in audio, and there are detailed discussions about getting the most out of direct connections to amplifiers using the analog outputs.
Do an advanced search on user name in this thread for "Bob Pariseau" and you will get detailed information about audio and other issues. If you've read all the posts since your first question in this thread, then you've read at least one of Bob's posts. Click on his name and you will get a menu where one option is a list of all his posts listed by the most recent. I think he posted about audio in the 103D thread sometime today.