If you are looking for great midrange, it is hard to do better than ATC.
We have the SCM 11 good, and the SCM 19 better and the are fantastic.
Huge sound stage, natural and uncolored midrange, good top end detail and great dynamics.
The ATC line is very balanced and musical, without being bright or rolled off. They like power however, we have driven them with as little as 40 watts
It will also come down to wether you prefer a more detailed sound Focal, KEF, B&W, Paradigm or the wamer more laid back sound, Harbeth, etc.
If you like neutral to a little warm try to listen to Dali, or the ATC.
Dave and Troy
Audio Doctor NJ