I found I prefer XS/psu against SN2 so definately listen first
Guess its down to speakers and taste
Perhaps the CDS3 is due for service ?
Boy, it's so weird how people hear things so differently, I remember after I sold my Naim 250-2 based system, so after a few years without what I consider a proper hi-fi system, I wanted to get back into a quality system, I purchased a Cyrus integrated amp, the 8 Dac, it was fine, but I really missed the sound of what I had been use to for so many years with my 250-2 based system, so I brought home the XS-2 with a Flatcap XS PS. Thought it was a worthwhile upgrade to the Cyrus gear, it was just about the right amount I wanted to spend, then just for comparison, my dealer had a demo SN2, told me just to try it, didn't really say anything else when I inquired, he just had this smirk on his face.
Instead of going into my own findings, I thought I would just make available a quote from a professional reviewer who's reference gear was the XS-2/PS combo, that is until he reviewed the SN2. See below.
Conclusions about the Naim Supernait 2 Integrated Amplifier
With any brand that has such a devoted user base, there is, understandably, a fear that subsequent generations of equipment are not improvements per se, but part of a business strategy to capture more market share. Predictably, that often requires sacrificing something in an attempt to appeal to a broader audience. Once you hear the Supernait 2, any such fears are laid to rest. It sacrifices none of the hallmark Naim qualities. Instead, it adds real muscle and improves clarity by, among other things, significantly lowering noise. Having watched it murder my XS-2 and Flatcap combination at every turn, it is my new reference.
Everybody hears things differently, and I get that, but the difference between these two integrated amps is so obvious as to which one is the SOO much superior sounding amp, I sometimes wonder what sonic qualities others base their opinions on?