Best Amp/Preamp for Sonus Faber Concertino-Please

Very interested in the Sonus Faber Concertinos. But,know how important the electronics in front of them are. If you have have had experience with them, please advise which amp/preamp components you have found to be the most effective. I know they tend to operate best with British made products with tube-like characteristic. Have already heard the differences between that Arcam and the Naim with them. Looking for other possibilities.

Welcome and appreciate both your experience and input.

Thanks,
Alex