Your better off cleaning the poor power coming in to your home with a decent conditioner.The power cord just brings it to your equipment like all the rest of the AC supply wiring.
There's no use spending extra money there.Here's a link on the subject. Link>>[http://www.hometheaterhifi.com/volume_11_4/feature-article-blind-test-power-cords-12-2004.html]
There's no use spending extra money there.Here's a link on the subject. Link>>[http://www.hometheaterhifi.com/volume_11_4/feature-article-blind-test-power-cords-12-2004.html]