In my post I was leaning over backward to be fair. While design is important build quality is even more so and reportedly the 555s from different sources did not sound the same so you do not really know what you are getting. I have not had Bryston but they are recognized as a top amp by everyone, the 555 was a good amp for the money. Unless the Adcom is half the price or less and the difference is important I would get the Bryston.