Best amp for Sonus Faber Cremona

I’ve recently acquired some Sonus Faber Cremona floor standing speakers and would like some recommendations for separates or integrated amps. Since these speakers are 14 years old all the write ups I can find are that old as well. Hoping for some current recommendations under $15k new or used. Room is 16x21 treated and speakers are 4ohm 91db. Please only reply if you have heard these actual speakers as they sound different than the newer lines of Sonus Faber.

 Thanks!