Don't waste your time wiht the Perreaux, though quite nice, the Bryston is better. You may think the Legends are efficient, but they truly are not. The will take ALOT of power, much more than you are giving them credit for.
I would not get an amp that is just 125, even Bryston power. If using Bryston, stick with the 250 varietal, and get yourself a 4B. Here is a great deal, not much more than a 3B: