Phil,
Mac and Classe both make excellent gear. I don't have as much experience with Classe as I have with Mac, so I won't go into too much detail about it.
Mac and Classe are very well built. I'd say even with Bryston to be honest. But neither carries the warranty, nor do they have a gentleman who frequents places like these and offers help

. They both support just about everything they've ever made, like Bryston does.
Mac is a very different sound than Bryston. Relatively speaking, its laid-back and smooth. Bryston is more forward and aggressive. Bryston is more punchy and pacey, whereas Mac has a more liquid like flow to the music.
Bryston and Mac are equally musical, they just take opposite approaches to it. I really can't afford much from either company if brand new, but if a Mac came up for sale at the same time the B60 did, and both were priced equally, I'd have had a very tough time deciding.
In the end, I bought a B60 without any regrets. It was the right piece at the right time for the right price. I've never second guessed my decision. If it had been a Mac, I'd have been just as happy, and had no regrets either.
Just my opinions. Sorry for side tracking...