Before money is spent on conditioners, you owe it to yourself to listen the Purist Limited Edition power cord, or better yet the 25th Anniversary AC power cord, or very best 30th Anniversary AC power cord. :-)
As to these ratings on the conditioners and regenerators, I think bcowen may have nailed it. I.E. they look good on paper for RMS, but when the transient of a big pop on a snare drum, or the dynamic pluck of bass guitar, everything is boringly softened.