Power Strip vs. Line Conditioner

There are also products like the Blue Circle BC-86 Noise Hound Power Pillow that has not plugs itself; and just plugs into a open outlet on your wall or power strip; and cleans the power for the whole circuit. I do not know how it works, but I have demo'd one and it does work.

A "power strip" is a glorified extension cord and in most cases junk IMHO. A very good conditioner will help considerably if your power is dirty, which is most of us. I use a Reference grade Vansevers conditioner. I has a plug-in made for amps, which sounds better than the wall in my system. Vansevers also makes a amp specific conditioner designed not to limit current (It called "The Unlimiter").
There are also products like those make by PS Audio that "regenerate" the AC power comming into your house into new fresh AC power.