I had an Amp 2 that was amzzing, I only sold it because I was downsizing the bedroom system as I didn't use it much. I agree with all the previous comments, they're built like a tank and sound great.
I must add however, that in my friends system (HT - mainly Levinson and Proceed), after a DIRECT lightning strike to his house, some of the Proceed gear blew, the Levinson amp wasn't phased. I know, it's extreme, just an FYI..