Been listening to the PL Evo 400 non-stop. I finally managed to listen to the Musical Fidelity M6si in the same setup again, bracing myself for the scenario where the dynamic and full-range sound of the solid state amp might sway me back. I waited. Then I heard what I never did during all of my listening years ... the sound was ... solid stateish - more processed, with a sheen of digital on it no matter the source. I plugged my Evo back on. The M6si was shipped back to Upscale today. Happily married to my PL now and she ain’t going back. Thank you all for the push to hold off on making premature conclusions.