dynaudio Contour II MKII

I am planning to buy a 2nd hand dynaudio countour ii MK ii which has rather rare dicsussion in the web.

Is there anyone can tell me what is the performance of this speaker? It  is said it is required a higher power amp. to push this speaker. And it bass is a bit slim. Is these description correct? How about it sound difference when compare with other Dynadudio speakers such as Contour 1.3SE, Contour 1.8 or Contour 3.3?  Your kind response will be highly appreciated.