Mine is a '2200, so maybe this isn't relevant, but it will play every SACD & DVD-A I've tried. It's a little erratic with DVD-Rs, however. Oddly, the only disc I've had trouble with is my copy of
The 13th Warrior. I've watched it half a dozen times in the past on the same player, and even after cleaning it the thing won't work.
The disc looks perfect, no visible flaws. Very peculiar.
From what I've heard, the 563A didn't "downconvert" DSD to PCM, but unfortunately the new model does (so I've heard). There may not be any sonic diff, but in that sense I guess maybe the older version was better.