>>The analog vs. digital connection discussion is a red herring in a way because all digital signals needs to get converted to analog somewhere in the equipment chain.
I think the analog vs. digital connection is relevant for the specific topic of comparing two CD players, but I agree in general you are going to want to optimize the configuration across the entire system, and changing one component may mean that you need to operate other components in a different way now for best results.
Now, ignoring all that for a moment...
How many people here believe that you can have an audible sound difference between players when playing CD if you are using a digital PCM connection to the receiver in both cases ? In other words, do we believe that the audible difference between players comes on the analog side or the digital side or both ?