[Yamaki]

I have a pair of Aerial Acoustic 8's and am seriously considering a pair of slightly used, well cared for MC501's. I like having a bit more power than my speakers will demand just to have the headroom and to protect them from distortion. There are times I drive my speakers hard and I don't want a particularly robust audio spike to kill a tweeter.

The MC7100, with a power rating of 150W @ 4 ohms and 100W @ 8 ohms seems a bit light to fully drive the 6T's, which Michael Kelly has spec'd out to run 50 - 250W @ 8 ohms.

If autoformers are desirable, and in my book they are a great feature, and to have sufficient power so as not to clip the speaker due to distortion, I'd look at a MC252 or MC302 vs. the MC7100.