The Tradition and the Serafino are speakers with sensitivities at 89.5dB@2.83V/1m and 89.6dB@2.83V/1m IEC standard.
Meaning they’re not voltage hungry devices but on the other hand they both have phase angle relationships with the impedance that lead to them being current hungry. So they may not demand a lot of voltage but they’re current hungry speakers(both).
So long story short, your amp needs to be a high current one and luckily your amp peak current hovers around 40A and average current RMS is 20A so you’re set on the amp side.
You say, you’re a fan of Sonus Faber’s tonal colouration but haven’t demoed them?