Hands down, here is the best protection you can buy for you electronic equipment:
http://www.zerosurge.com/I have been using them since day 1 when they came onto the market (Actually, before they came to market. I know the inventor.) and know first hand that they work. Have NEVER lost a piece of equipment that was attached to one, ever.
In addition to what Garth mentioned about MOV's, I'd like to add that using MOV's is more of a danger then not using anything at all. MOV's can and will fail, without warning, and cause a fire. I have seen it happen many times. Also, during a large surge, they can fail and cause a fire. You are better off NOT using anything that contain MOV's and like components.
Bob