From my experience with ML2.1 and some speakers there is a big difference between "very well" and *ahem* very well.
It is true, that they can drive lots of speakers, more than most imagine, but only with High Efficiency Speakers - I think 8 ohms and 96++dB - you can hear all subtle details (breathing from the Artist, moved Air etc.).
In such a combination you will hear, how good they really are.
Then they are more than very well .....
Much more.