Jeff Rowland 2 or Classe 25 for Avalon Eclipse

I would go for a Pass labs X-250.

Both amps sound warm and musical. But a sharp individual focus they both do not have. Avalon ( which I sold for over 6 years) can give a deep and wide stage. But misses the sharp individual focus of instruments and voices. These amps have the same properties as the speakers. At the end you miss.......yess the individual focus. For me it is that simple! Like 1 and 1 is 2.

Do you use the first version of the Eclipse or the second improved version?

Avalon speaker can give a wide and deep stage. So you need an amp what is capable of giving a 3 dimensional image. Bryston is a 2 dimensional brand.