Back to the original question, if you want to augment your Monster HT-800, you could always add a noisehound plugged into the outlet feeding your Monster, or into the Monster itself.

Here are some reviews:

The current noisehound version is the BC 86 MK5 and it incorporates surge protection as well as filtering. They cost 140 ish, but if you have a system worth 3-6K, it's not really a large expense.
SC-05, HLT6189, Oppo BDP-93, Blue Circle Audio FX2
Axiom M2v3's, QS8v3's