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

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

This is difficult because the sound of your system is effected by everything in your system. Now that that is out of the way and given the above, I like the D’Agostino upper end models. I really like the sound of my First Watt SIT-3. So clean and uncolored.