For what it’s worth when I reviewed the NSS333 for Soundstage a while back the uplift from my NDX was absolutely gigantic - much more air, space and transparency to the sound. The gap was so wide I actually stopped unpacking the rest of the 300 system just to listen to it into my 82/250/HiCap ATC SCM40 system. It left me realising just how much streaming sound quality has improved in recent years and that was just comparing Tidal at 16/44 on both devices. The NDX runs a bit closer to the NDX2 if playing local 16/44 rips of course, although I have basically stopped playing those because the NDX2 is so good on Tidal that it is better than an NDX is playing local files. At that level of quality I have pretty much stopped buying CD’s and ripping them - why bother? If I want to own an album I tend to buy on vinyl now because at least that offers a different experience to the digital copy. I simply wouldn’t have done that as an NDX owner.
I couldn’t afford the NSS333 though and so decided to make the move to NDX2 as the “next best option”. When I arrived I was genuinely surprised just how good it is and how close it gets to the NSS333. It’s always difficult to quantify anything by percentage uplift in sound but if the NSS333 was scored 100% I would put the NDX2 at 85% and the NDX at 50% of the performance.
On that basis then I would suggest that the NDX2 at the sort of prices quoted here, and bearing in mind the fact it uses the latest Naim streaming architecture is a bit of a no brainer! The NDX2 gives you a much nicer screen that isn’t prone to failure, it offers Qobuz and
Just my view as someone who has heard all three and lived with them.
JonathanG