Your typical surge surpressor is nothing more then a MOV. A $1 at Radio Shack. They last 6-12 months. have no sign of failure other then *after* the fact.
If you desire good electricity, consider a line conditioner. Triplite / Isobar seem to be good ones. Best Buy sells thers for the audio equipment. These are overkill, you don't need to filter out all those harmonics.