I have used both the Thiels and Watt/Puppies (my current) speakers. They are very different but share one common characteristic: they are highly detailed, sometimes sounding analytical or a little bright to the point of hardness, especially with less than perfect source.
I found that the MIT CVT cables, while not ideal for other speakers, match the Thiels and W/P very well because they tend to soften the top end just a tad.
Likewise, I found that a pair of BAT VK-60--the newer SE-75 should be even better--can drive these speakers to great satisfaction because of good match in strengths and weaknesses. The midrange is glorious, the top end detailed and smooth. Only the bottom end could be a little tighter and deeper, but I use a subwoofer so that's not a big problem. The solid-state amps I've tried delivered better bass but none could properly handle the speakers' top end. Of course, I haven't tried everything.
I found that the MIT CVT cables, while not ideal for other speakers, match the Thiels and W/P very well because they tend to soften the top end just a tad.
Likewise, I found that a pair of BAT VK-60--the newer SE-75 should be even better--can drive these speakers to great satisfaction because of good match in strengths and weaknesses. The midrange is glorious, the top end detailed and smooth. Only the bottom end could be a little tighter and deeper, but I use a subwoofer so that's not a big problem. The solid-state amps I've tried delivered better bass but none could properly handle the speakers' top end. Of course, I haven't tried everything.