I too added an Everest with a Sigma XC to my system (which has a full loom of Shunyata Sigma cables) and I found the difference to be extraordinary. The Everest is a "component" in its own right, and in addition to all of the things that the OP heard, I found that the depth of the soundstage was much improved. Prior to the Everest, I always felt that although my soundstage was wide, it lacked depth. No longer. The Everest was a surprising investment and highly recommended. I don't know how it works, really, but it does! I have mine on a wooden platform with isolation feet, which I would also recommend in order to isolate it from vibration from the hard floor that you currently have it on.