Why stop with the HT equipment? They do make nice versions that will do the entire house and are genereally about the same price. They connect to the main feed at the box. A little harder to install than plugging in, but if you have dirty power, then you have lots of other things plugged in that could benefit.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70