The NDS is extremely well built as @SoundsOfMusic says. It has suspension system that requires transit bolts as does ND555. It was Naim’s flagship streamer at one point.
But some prefer nDAC with non DR 555PS.
I was brought up on NDS and loved it dearly. But got with modern programme and now have ND555 which is not dissimilar.
For the funds nowadays the NDS is an incredible bit of kit. Screen failure is common though so budget that in.