Old thread, and comments are spot on. FWIW: own the Alexia 2s and had them on McIntosh stereo amp. Not offensive, but somewhat veiled. Moved to Pass X600.8s and a huge improvement. Heard both Boulder stereo and D’Agastino Progression monos and Momento monos (new release version) on them. Heard the ARC 160s, too.
And what they say seems true: the Wilson’s sound best IN MY OPINION on ARC for tube, and D’Agostino for SS. We liked the Momentum’s, stereo or monos work, well over the Progressions.
We will be upgrading in a bit to either ARC or Dags Momentums, most likely.
Just my two cents.
j