whole house protection

Recently our furnace was the victim of a power surge during a wind storm. Glad it was not the computer or audio components. Repair man said the furnace was probably running when it happened. If the furnace was not running it possibly may not have happened. We have protection for the computer and audio/video stuff but now I am thinking of installing a whole house surge protection or conditioner. Anyone out there with experience in this. Any comments. Recommend a product line?