What is the best solid state amplifier you have ever heard?

I’m listening to both the BEL 1001 MK V and the Plinius SA-100 (updated in 2015 to current specs and worn replaced parts). 

They are both so musically satisfying and 3D resolving. I’ve had mega-amps in my system and the two shine with Quads and WILSON Audio Watt Puppies.

Now that I have a young one in the home I’m impressed with the low SPL detail as I listen quietly at night...this is difficult to achieve and retain a fullness in the sound warmth and tonality. 

@lpretiring The original technician(s) is still at Brooks Berdan, and they service all generations of BEL 1001 amplifiers, and just about any other brand of audio equipment:

https://brooksberdanltd.com/audio-services/audio-equipment-repair-los-angeles/

My still burning in SIT 3

Nad 3020 for sure.

Or was the Naim 32/110.

Perhaps it was the Creek Destiny.

No, it was definitely the Arcam 10.

But on second thoughts it could have been that cheap shiny Japanese transistor unit from the 1970s which lasted for decades and is still going strong the last time I heard.

Of course none of them matched the liquid midrange of valve amp that came before all of them - but it took forever to realise.

Agree with @soundsrealaudio that it was a Bricasti amp but the qualifier is the speakers and amp have to be synergistic.