I've got a pair of SF Minuettos (3 generations or so earlier than the Concertino) in my home office. I think the specs are similar @ app 85 db/1w/1 meter - I'm not 100 sure about that - between the 2 models. I use 100 wpc of SS amplification with my Minuettos, which is more than enough. You're probably at the margin - not a disaster, but more power certainly wouldn't hurt.
Marty
Marty