In reply to:

Well with regards to the 75 vs 85 db standards, I have made a call to a friend of mine in LA this morning who is the recording business, and he has confirmed that the reference level for audio is 85db and that The THX technician, (The guy I spoke to was actually a certified tech, not a marketer)was correct that theater is 75db.

The THX technicial may be referring to using the test tones in a THX receiver, or the THX Optimode on some discs. Maybe those are encoded for 75db, I don't know. But the point you seem to be missing is that there's not a universal standard for all test tones, they can vary in loudness depending on how they are encoded. In the case of the Avia test tones, reference level = 85. It says so right in the disc's documentation.

As for audio/music, was your friend maybe referring to SACD or DVD-A? Because there is no "reference" for CD-Audio as part of the redbook specification like there is with Dolby Digital.