Jim, I've been running Rogue audio M180 monoblocks. The Herron M1s are pretty old, but they were upgraded to a FET front end a couple of years ago at the factory. I couldn't really find much information about them, but bought them primarily based on Keith's reputation and all the great things I've heard about the Herron phono stage. A little less power than the M180s (150 vs 180 watts), but they are super quiet, detailed, and dynamic, and run really cool, take up less space, and I will never have to buy 8 KT120s for them.
