I must say I'm a skeptic when it comes to these things. I've been having ghosting problems with my cable. My online research has pointed me towards a line conditioner, which may help with the cable signal as well as overall audio/video in my system. My local dealer has given me a Monster 2000 something to try. It's basically a massive power bar, but has AC filtering as well as protection. I will try it out tonight. If I can see/hear improvements, I will probably buy a component-sized version. I guess my question is, what differences should I be looking/listening for? aside from the obvious ghosting... what improvements have you experienced with Line/Power Conditioning?