Who has dumped the power conditioner?

Tbg,
You are right, to address the residual noise present on a dedicated requires a conditioner whose output is quieter than that of the dedicated line. Conditioners capable of this are, indeed, rare and truly special, but they do exist.

Most of the power conditioning is a pile of hogwash. Another way to extract money from impressionable audiophiles. If there seems to be market for something there is always an entrepreneur who will have a crack at it.

Plelko, I think most conditioners lose the pace of the music. I always liked the Sound Application and now the Synergistic PowerCell as they do not.

I second Tbg and the Sound Applcation.

i think it depends on one's electricity and were one lives.
I noticed that power conditioners help if your powerlines are near offices, industrial factories, sites like that.
In third world countries, powerconditioners do help a lot.
In the US, i can do mostly without them. But my friends in Hong Kong, China and Philippines really need them in their system because their electricity is not as clean as the ones in the US.
Definitely, try them out... YMMV