@chorus Not to be a Pass pusher, but you may also consider some first watt offerings. Nelson tests all of his products on Tannoys and as such you should be able to find an ideal match from the lineup.
In various systems over the years I've tried a number of amplifiers (Atmasphere M60s, Lyngdorf TDAI3400, Coincident Frankenstein 300b monoblocks, Classe INT150, Pass Labs XA30.5, X250.5, XA25, First Watt SIT2, and DIY First Watt SIT3 and F4 monoblocks).
I've always enjoyed the Pass products, but did not end up buying the XA25 I demoed, sticking with my underpowered Coincident Franks before ending up with First Watt F4 monoblocks (all with Coincident PRE speakers, see my system page).
I don't quite have enough experience to be sure that this is the reason, but both the Coincident 300b Frankensteins and the First Watt F4s are dominated by 3rd order harmonics, while the XA25 is dominated by the 2nd (and all three have low levels of higher order harmonics). My guess is that my ears are sensitive to the balance between the 2nd and 3rd, and prefer amps that are 3rd harmonic dominated.
Given everything that you've stated, it might be worth trying out a First Watt F4. Since you don't listen loudly, you probably will be ok with a zero gain amp. My system can also be bright and I'm also very sensitive to forward amplifiers, and find the F4 to be refined and smooth on top. Unfortunately they don't make new units, but the price will be right if you can find one used (or have someone DIY one for you, they sell official boards at the DIYAudio store).
