Amp for Sonus Faber Cremona M's


I'm looking at upgrading my system and I think my speakers are going to be Cremona M's. My current amp is an Arcam A28 and that is obviously not an ideal paring for the Cremonas. Does anyone have experience with what pairs well with Cremonas? Budget wise I'm looking at something in the $5000-$8000 rage.
zedak
Im having great results with the AYRE V5-xe. but my cremonas are the originals , not the m's
I'm using Audio Research VS115 with my Cremona M's. I think there is good synergy between the two because both excel in midrange reproduction. I've tried various solid state amps (Classe, McIntosh, etc.), but the sound is a bit too bright and lacking in warmth for my taste. Others may prefer the sound of solid state. FYI most of my music listening is classical and for me, tubes come closer to recreating the sound of live music in a concert hall.
The Burson's timekeeper have an outstanding midrange with soft treble, not fatiguing. Everything gets better once you have 2 units on bridged mode. Worth checking.