I own the original sophias. They are very revealing of associated equipment.
I find they work well with approx 50-75 tube watts, but when fed high power tubes they create a huge three dimensional stage wonderful tonality and well resolved bass.
I use Audio Research VM220 Monoblocs and the combination is gorgeous.
The sophias, (and all Wilsons) require meticulous set up and room placement. If this is not accomplished, you'll NEVER experience their true glory.