I know I've posted this in past threads, but I'll say it again- grab some APC Line-R 1200's..... They are cheap as dirt($50), condition the power, regulate voltage, and isolate noise.
I had a voltage spike come through my house last week due to a thunderstorm. Destroyed the APC, but it saved my SCA preamp, right monitor, right screen, and US-2400.
Also, when power goes out, I noticed these APC units hold power for about 10 seconds, so it keeps my PC turned on for quick outages. Saves me a ton of heartache. Grab some for the road too, would be great to plug in to one at a show where power is usually 'lacking'.