Karsten,
Interesting point there. I initially had problem (edginess and fatigue) integrating w/ my solid state system when I originally acquired the NuForce MCH3SE. However, after some adjustments, softer isolations, more synergistic cabling, power conditioning, the system just sings now. Turns out I had initially tweaked the system to wring out every bit of details from a Bel Canto Ref1K amp pair as well as others. This isn't something I needed at all and counter-productive to the Nuforce's nature as it has all the details, accuracy and speed inherently. I have since "soften" the isolation, have interconnects and PC that are neutral or slightly "warmish" to really bring out the music from the NuForce and have now succeeded. No more edginess and fatigue, just music to my ears.
Regards,
Kenobi