Tube Mono-Block Recommendation

I like the Amps, to be fast, Accurate and musical as possible. Giving me close to Transistor Amp Clarity

That should be no problem :)

Check out Quicksilver. I use mine with Harbeth's and think his amps are great!

Seems like CAT, ARC, VTL, VAC, LAM -- what is it about 3-letter amp companies? Obviously Atmasphere and Rogue too. All those great choices aside, ever think of Class A solid state? Clayton Audio. Pass Labs. Plinius. Gryphon. They might be worth a look given your requirements. Or perhaps a hybrid. Something like the Rogue Medusa or Moscode? Just doing a brain dump here. Best of luck.

Wavelength Audio and Art Audio are two of the best.

Dragon_vibe, the impedance curve for your speakers, as shown here, suggests that the tonal balance of the sound that is produced in the mid-range and treble regions will vary dramatically as a function of the output impedance and damping factor of the particular amplifier that is being used. And probably also with the robustness of the amp's power supply.

So I suspect that in the $12K price class you are considering, synergy between the amplifier and speaker could very conceivably be a more significant consideration than the intrinsic sonic character of the particular amp. My suggestion is that you research what amplifiers are being used, and have been used, by others who have your particular speakers.

Regards,
-- Al