What Amp with Sonus Faber Olympica 3?

Greetings....Curious to know what amp are you using with the Olympica 3?  Seems they need some juice at the 80-120Hz region and dip to 2-ohms so I understand it takes some current to properly drive. Just sold a ARC Ref110 and looking for a replacement. Short list:

Pass Labs 150.8 or 30.8
Audio Research Ref 150/75SE
McIntosh MC275
Primaluna EVO 400 

Preamp is a Primaluna EVO 400. Listening room is 16x16 with vaulted ceilings and listening volume level can top out around 90db give or take a few  :)