I would like to propose something a step up from a surge protector. They are called 'power conditioners'. Here's an example of the two furman units I have.
These serve two functions: they are surge protectors on steroids (they protect a much higher jolt than a typical store-bought unit, and they also have additional electronics that help filter out "noise" that is introduced into the signal from other electronics in the house. (As I understand it, various electronics connected to the wall can introduce variations in the current that can affect other electronics downline. Things like AC units can have a particular affect.) I was having a lot of hiss come out of my studio monitors due to the very poor wiring in my house. After introducing these two units, I notice that the hiss is softer and more white/neutral. Just as important, however, is the fact that they are much more adept and "active" at dealing with surges. To see what I mean, watch this video demonstration:
https://www.youtube.com/watch?v=JujCqjLSQF8While I still unplug my most expensive stuff frequently (I live in Oklahoma where we have thunderstorms of legendary ruthlessness!) I do feel a lot better having these units protecting my organ and speakers. There are many to choose from, and some become quite expensive and have various "banks" of outlets that are all shielded even from each other on the same device. Just search for "power conditioners" on yahoogle and you'll find plenty of info.