I also use the M300s with VSA VR-4JRs speakers and a tube pre amp (Dehavilland Superverve) and to my ears, it is a beautiful sound. I tried a couple other solid state amps (Bryston,PS Audio etc.), however, the Bel Cantos for their price, seemed better for me at the moment. The M300s appeared to have taken a long time to break in, especially the lower end, but, thats the case as you know sometimes.
