Hey,
I would take Goldmund 28.4 they are my favorite amps. Also many folks will say that 29 is better. I wholeheartedly disagree. Perfect companion for 28.4 is 27+ you must use GOLDMUND pre otherwise you will never hear how GOLDMUND sounds. They will be perfect for you Avalons make sure that you use own Goldmund-lineal , Siltech or PAD wires. Anything less would be uncivilized.
I for one believe that GOLDMUND is much better than Boulder product.
GOOD LUCK
I would take Goldmund 28.4 they are my favorite amps. Also many folks will say that 29 is better. I wholeheartedly disagree. Perfect companion for 28.4 is 27+ you must use GOLDMUND pre otherwise you will never hear how GOLDMUND sounds. They will be perfect for you Avalons make sure that you use own Goldmund-lineal , Siltech or PAD wires. Anything less would be uncivilized.
I for one believe that GOLDMUND is much better than Boulder product.
GOOD LUCK