My amp has no faults

If the amp performs as designed, it is inherently perfect by definition. Whether or not it's perfect for your needs or matches perfectly with everything around it is a matter of personal taste subject to mood, humidity, bird noises, neighborhood electric current draw, party guest brawling, or hat choices.

I find no fault with the Hypex NCore NC400.
Wilsynet

Check here for opinions on the best amp ever built. Hypex Circle
Never heard it, but sure is a lot of excitement over it.

I'd opine the Bada hybrid SET headphone amp is one of the very best sounding amps I've heard, regardless of price. The sound of the Bada out of the box without, you know, breaking it in and isolating it and rolling the stock Chinese 6SN7 tubes, is excellent, but the sound gets quite a bit better when attention is paid to tube dampers, isolation, contact enhancers, things of that nature.

No amp can drive all speakers made.

You first have to sort out that distinction.

Then there is the simple fact that tubes have a different sound (less odd ordered harmonic distortion) which is why they are described as 'smoother'.

You have to sort out if you like that.

So there are preferences involved. In my case, if there is brightness (extension and speed are not brightness by the way...), its a deal-breaker, so I avoid transistors.

I said it best first. And for that we should all be grateful.