Something else to bear in mind is that things like a "$20,000 Protection Guarantee" is a scam. To collect you have to prove that there was a spike, that the spike destroyed your equipment, and that the eqipment was plugged into the protector at the time of failure, and that the protector failed. Once in a while I read where someone has a bunch of these things and has carefully added up the value of everything plugged into each one.