They need high quality amplification, but not necessarily high wattage. I brought my old Mark Levinson Nr. 29 (class A with only 50 w per channel) to a Magico dealer to hook it up to a pair of V2. Long story short, I brought them home that day.
I used to own a series of B&W products, and prior to this upgrade, I auditioned Dynaudio lines and some Focal offerings. I now understand why B&W speakers have lost their reputation among serious audiophiles and high end stores, I digress... B&W nautilus diamond 2 series throughout their range sounds clearly worse than mid range Dynaudio or Focal. Now, magico is in another league altogether.
Anyway, V2 sounds amazing now in my bedroom, connected to an old but real gem amp from ML. Only 50 W per channel solid state, but V2 sings beautifully throughout their entire frequency. After reading their reviews about being a great deal at $20K???, but once you listen, you will know. It will be very difficult to find anything out there close in sound quality and build even at this price.