You said that "lately" the HD picture quality is bad. Was it good to begin with? How does the image quality look on the on screen displays from your box? Do they look crisp and clean, or do they have the same artifacts that the video images have? If the on screen displays look perfect, then the problem can't be with your power, and your TVs aren't damaged.
Do the video artifacts look like they are digital or analog in nature? Voltage fluctuations (especially through analog component video cables) would most likely produce analog type distortions, not digital pixelation problems (like the motion based pixelation you described).
I doubt that any of the problems you have are related to the AC power you are supplying to your box and your TVs, and I don't think that any of your equipment has been damaged by "bad power." I also think that all these expensive surge protectors are a complete waste of money, at any price.
Do the video artifacts look like they are digital or analog in nature? Voltage fluctuations (especially through analog component video cables) would most likely produce analog type distortions, not digital pixelation problems (like the motion based pixelation you described).
I doubt that any of the problems you have are related to the AC power you are supplying to your box and your TVs, and I don't think that any of your equipment has been damaged by "bad power." I also think that all these expensive surge protectors are a complete waste of money, at any price.