Mariv,
Yes, I agree with you about low powered amps and Magico. What do you consider appropriate power for the Magico's? I have heard better dynamics with horns and even Wilsons, but the Magicos sound great in most other areas.
The Mini II is a demanding load. I find that the Pass XA160.5 has enough power - 320 watts in class A at 4 ohms and even more power when it switches to class B. It can also deliver 36 amps of current. I have heard it with ASR, Nagra and the Pass XA30.5 and XA100.5 and I prefer the XA160.5 to the others. I'm sure there are even more powerful amps that are an even better match.
I heard the Magico V2 with a 100 watt Spectral stereo amp and it sounded fantastic and dynamic, but it is an easier load.