The "original sound" is the original sound, no matter how our ears interpret it. I love and respect the CDS-2 as it fully addresses the main criticisms of the CD medium - spatially flat, lean and unexpressive bass and bleached tonalities. This comes through almost irrespective of system it's connected to and to me that's special indeed. Maybe "the truth" isn't quite like this either, but in this instance I don't care, as when listening for hours to the CDS2/XPS2, I was able to completely forget the mechanics of CD playback and just enjoy the copious CD's I played on it. I can't really say any more in its favour - it just did it all at the time.
I'm sure there are other players out there which do the above and maybe Marco's ton-up vintage Sony pair are loads better in sonics (I'm taking the lush construction and operation for granted here) and if you can find them and get Audiocom to update them, the total cost may well be less for all I know.
Sorry, I still feel the original CDS is pants as a decent CD player. It was just the first with a Naim badge on it, so the first machine that the flat-earthers would take notice of as being any good (been there and witnessed it - Messenger, Frankland and Steward have a lot to answer for IMO).
Tear down these walls; Cut the ties that held me
Crying out at the top of my voice; Tell me now if you can hear me