I've owned an avr600 for almost a year now, and I have to say it has some go. It actually is a true 120w/ch over 4/8ohm. 150w for 2ch stereo direct mode. There are test results proving that its a true 120w, but I don't remember where I saw it.
Sound wise though it is pretty damn good for the money. I've compared it directly against a Simaudio moon integrated i3.3, and it sounded pretty much identical to the avr600. Pretty nice considering the i3.3 is $4k for 2ch and the avr600 is 7ch with 5ch bi-amping with a ton of features for $5k. It is a remarkable feat that Arcam has achieved. I even thought the avr600 sounds better than alot of seperates out there. Don't hate me, but I think it sounds better than krell, and rotel seperates. My $.02
Sound wise though it is pretty damn good for the money. I've compared it directly against a Simaudio moon integrated i3.3, and it sounded pretty much identical to the avr600. Pretty nice considering the i3.3 is $4k for 2ch and the avr600 is 7ch with 5ch bi-amping with a ton of features for $5k. It is a remarkable feat that Arcam has achieved. I even thought the avr600 sounds better than alot of seperates out there. Don't hate me, but I think it sounds better than krell, and rotel seperates. My $.02