Sonus Faber Concertinos & 30watt tube integrated?

This might be helpful:

http://www.tnt-audio.com/casse/faber.html

Shouldn't be ANY problem. The Concertino's are "sweet" sounding and, IMO, S-F speakers generally like classical & jazz, in that order. So they match your musical taste.
You want an "articulate" amp because the Concertino's are more charming than they are precise, i.e. when well positioned, the musical results overall are superior to resolution, details, etc. A very detailed amp will add more detail...
But, anyway, the music is what you're after, right?

From my listens to the Concertinos I'd say they might just be what you're after. Get a dealer to let you take home a pair of the weekend and see if they do it for you. Bet they will!