Interesting that you seem to be just generally dissatisfied for some unknown reason, just a lack of pleasure. I tried a lot of ss amps looking for the pleasure I found from my tube amps without the heat. None came close, including the x250, until my MC402. Now I am COMPLETELY SATISFIED. Wierd, eh? Feels wierd to me not to want to upgrade something... My system now is ARC Ref3, Mac MC402, Quad US Monitors (or Thiel 2.3's), VPI Scout,Skala, Minimax phono, and Marantz SA11S1.
My point is, the MC402 gave me much more satisfaction than any other amps I have heard.