Get something with an 'attached equipment warrenty' or similar policy. There's nothing you want to pay for that can really protect against a really nearby event like a lightning strike. If equipment protection is what you're after several outfits will replace up to $xxxx of equipment in the case of damage. This should work every time

Some of the protectors have filters as well, and I understand that may make a difference for some folks, I've never had that sort of power problems though.