Those Triangles must really be something. I owned a pair of the M20s a few years ago and thought they were fantastic speakers, wish I still had them.
But to answer your question, yes, I currently use an older pair of Soliloquy 5.0s which have bested speakers costing 3 times as much. At least to my ears this is the case.
Done the same with some Stereophile recommended amps also. Maybe my ears are miss-tuned.