I have the MC602 mated with an Hovland HP100 linestage, driving the B&W 803Nautilus, and the sound is awsome. Prior to this, I had the MC352 and the C2200 tube pre, and I was also very happy with the clarity, neutrality, and coolness of the amp. It never run hot, unlike other brute amps out there.
I don't know why so many people are knocking Mac stuffs when they didn't even give it a chance to listen to Macs, and at least check out the built quality of Macs.
Email me if you have any other question.
Cheers,
Tim