Hi,   I'm considering installation of some form of surge protection as well as power filtering at the fuse box within my home.  I've had a couple of A/V units pack up recently (projector, AVR, 2x TV's), and the first thing the retailers or servicing people mention is power surges.  (For information, a couple of units had excessive dust in them, and this issue has been addressed via a filter on the air return duct within the house).   To be honest, I'm skeptical - I know power