Actually spent a bit of time listening to the Pet Sounds DVD-Audio yesterday. It's a dual sided disc, DVD-Audio on one side, DVD-Video on the other.
First on the 5910ci, where there were a good number of dropouts over the course of playback, between one and three on most of the tracks. And then on the Oppo 93, where it played without any problems. (5910ci via DenonLink, 93 via HDMI.)
Decided that the 93 actually sounded pretty good, at least once the volume was cranked up a bit. So may not be so bad after all in comparison with the Denon.
Next up, somewhere along the line, will be to check out a few more SACDs. (DenonLink will give my receiver DSD directly, but the 93 has to convert it to PCM and then send it via HDMI.) And then finally some CDs (HDCD encoded and just plain ones). And a few more DVD-Audios as well.
My 5910 and 5910ci have both been a bit finicky from the start, kind of hoping that the 93 will work out to be a reasonable sonic facsimile so I can free up some space on my rack. Only thing that's bugged me about the two Oppos I've had is that for some reason the first bit of sound is just about always cut off, at least when first played, kind of annoying to have to go back in order to hear the whole track. Otherwise, if the AQ and PQ hold up pretty well in comparison to each other, may be time to just unplug the 5910ci once and for all.