I honestly don know how to make Sonus faber concertino sound good. But I would stay away from anything tube based, as I mentioned before. Tubes might be good for very forward and bright/detailed speakers. But for sonus faber you need good gain , some smaller amps would not control them very well. But i gues you are not looking at small amps.
I heard Rega amps and they were fairly bright sounding which might pair well with SF, but I never actually heard Rega-SF combo.
What i am trying to suggest is ask around for SS amp with real forward sound and at least 100W of efficient power output.SF speakers need their butts kicked before they move.
Stay away from amps that emphasise bass (which is hard to do) because SF by design will color everything with bass.
I heard Rega amps and they were fairly bright sounding which might pair well with SF, but I never actually heard Rega-SF combo.
What i am trying to suggest is ask around for SS amp with real forward sound and at least 100W of efficient power output.SF speakers need their butts kicked before they move.
Stay away from amps that emphasise bass (which is hard to do) because SF by design will color everything with bass.