Firstly apologies to the OP for going slightly off-topic.I don't know. I think he makes sense.
The best Amps are those that do not distort the signal. Afterall, the Amp is only there to amplify the signal.
Any sonic signature that an amp may apply to the music, has to be down to it distorting the signal in some way (it cannot improve on the signal, so to suggest one amp is say more detailed than another, is in reality saying the less detailed amp has ended up degrading the signal to a much larger extent) .
Different people will read different things into this sonic signature, hence it is completely subjective. Ie some like the Naim sound, and some don't.
Considering most amps are completely subjective, what is the point of discussing it to the Nth degree?
I think he makes a lot of sense. He accepts amps may sound different to each other, but is pointing out that actually, they shouldn't if they are doing their job correctly.
I don't think he is the only one thinking along similar lines either.
The way Roy Gandy has said- "You can't polish a turd". As in, you can't improve upon a musical signal. I believe he was getting at a similar point anyway. My apologies if he wasn't.
I've been looking at the specs in more detail for Regas (Brio) and Naims (Uniti range)
Considering I'm thinking of a Uniti Star, all I can say is, it is worrying! You can certainly see why people talk of the Naim sound.
In comparison, the Brio does exactly what an amp should do.
Yes I know I am comparing two very different products, but it was a good way of checking these things out.
Having read some of Shaw's posts on HUG, where he claims he won't recommend any particular amp. Then on a video about the C7s he actually uses a Hegel and explains why. If that's not a recommendation not sure what is. A fabulous speaker designer but full of BS IMO.
I don't do graphs or look too deeply into amp specs. I couldn't tell you much about the Leema other than it's 80 watts per channel into 8 ohms. If it sounds right, it is right.
I think any system is about synergy. My basic rule of thumb is mix light with dark (lively and smooth). To what degree depends on room acoustics, layout and size. IME, a room, whether dedicated music room or living room is as important as the system itself.
Naim can sound great or nasty -- they are very speaker dependent. The Leema has similar traits minus the fatigue... it ticks many of the boxes.