I still have my theoretical doubts about the transparency of the A/D/A path 990 will employ, especially with high definition sources. Converting to digital and then back to analog is done at what sampling rate and word depth? For if it's the red book spec of 44.1/16, then the superiority of the HD audio formats will be annulled and the sound won't be better than red book CD even with stellar conversion, which I doubt.
It will be better than the compressed Dolby, true, but still not all that it could be had the 990's analog path staid pure and the bass management been left to the Oppo, to be done in the digital domain.
As always, "I reserve the right to be wrong"