I have tried using the Pioneer 563A as a transport and thought it was less than decent compared directly to a Panasonic RP91. Admittedly, the RP91 was a lot more expensive, but it wasn't even close.
If you are into modded stuff, I am a big fan of the Empirical Audio transport mods to the Sony S7700. I use this one as my reference transport with a Dodson DA-218 DAC. Have compared it to transports from Mark Levinson, 47 Labs, Esoteric, and have found it to be "in the ballpark" with all of these.