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

I’m Surprised that no one mentioned Jeff Rowland especially the Model 12’s which was a major breakthrough 20+ years ago. It changed the game. 

From my experience, though based on difference systems:
Bryston 4B3 and 28B3 monoblocks
D’Agostino Momentum Stereo amp
First Watt SIT-3
Classé Delta monoblocks I heard at Axpona

Funny you should ask-  
I’m right in the middle of a classic solid state cult amp shootout.  I am comparing a Bedini 100/100, Bedini 25/25, Bel 1001, Sunfire 300 and a Forte Model 4a with Soderberg mods including blackgate caps.  I usually run Coincident mkii dragons or a coincident SET, but these solid state amps are incredibly musical and I think I would be happy with almost all of these (the Sunfire being the exception) on a long-term basis.

MBL. Sweet and tubey. 
Too be, or...

Interesting question in that I have not yet zeroed in on the amp that makes me want to stop looking.   I have owned all of the amps below so I had a long time to evaluate each.

The top 5 in no particular order would be;
Clayton M300 Class A monos
Lamm M1.2 Hybrid Class A monos
Cary CAD 500MB monos
McCormack DNA-500
McCormack SMc Audio DNA-2 LAE

Others that were ok to pretty good include;
Cary CAD 500.1 monos
Clayton M200 Class A 
Acoustic Imagery Atsah NC1200 monos