I had a Panasonic DVD-Audio player (DVD-RA60) that was a pretty nice unit if you didn't need progressive scan and didn't wand SACD, but I've recently replaced it with a
Yamaha DVD-S1500 universal player. I had considered Denon's DVD-2200 (which looks to have been replaced by the 2910), but that was outside my price range and I never did listen to one. I haven't heard the 563 or any other Pioneer players to know how they sound in comparison to the Panasonic and Yamaha, but I've found DVD-Audio playback on both units I've used to be very comparable. Another thought - if you like the Pioneer's DVD-A and SACD performance but want a video performance boost, you could keep the Pioneer and try an entry-level Denon DVD-V player like the DVD-1910.
Oh, yeah, I haven't had a chance to finish digging into the question of "P.PCM". Since we are using analog outputs for DVD-A and SACD, what we are hearing is not PCM (the lossless digital format used by CD's), and neither DVD-A or SACD use PCM for storage on disc. My old RA60 would also show P.PCM during DVD-A playback, and my new S1500 does it as well. My initial suspicion is that this is referring to the digital audio output being created by the player (which is a downconverted datastream scaled back due to copy protection concerns) since PCM would be easy to generate on the fly, but I haven't been able to verify that anywhere.