I , too would like to know who has actually listened to both of these recievers. I own a 507 with an Arcam DVD player and Monitor Audio Speakers. Though my B&K seems in great company and is making great music with its fellow Brits, I have to wonder how the Arcam reciever would sound. Less power, yes, but my newest addition was the arcam dvd player and it just simply is the best dvd player I have heard other than the 5k esoteric....I know the reviever has to be good...BUT the B&K is great as well...