Personally, I would rather listen to a CD5x/flatcap than a solo CDX2. With Naim, the power supplies really flesh out the sound, like going from regular tv to hd. But - the CDX2 with the XPS2 is absolutely in a different league. Once you add that power supply, the CDX2 absolutely transforms, IMO. So I would buy the CDX2 if I knew I was later going to add the XPS. Not that it sounds bad by itself and I guess some might even prefer it to the 5x/flatcap. I just added this because I didn't think the above posters were emphasizing the very big difference between the CD5x/FC and the CDX2/XPS2. I see you have a x-03. Are you considering giving that up for the Naim player?