You ought to consider the Sanders ESL stereo amp. I have heard it driving Cabasse, Dynaudios, Harbeths, Vandersteens and it is consistently good with all.
There is something "correct" about the highs, a kind of purity which is hard to describe. So often when listening to digital sources, I would get fatigue because of the hard sounding tweeter. However with the Sanders, you get very clear and clean highs, which you want to just turn up the volume because it sounds so good.
The amp also has a firm grip on the bass, which allows you to hear deeper than ever before. In fact the whole spectrum is so well controlled, the PRaT is also well served, the music comes across as a consistent whole.
