Surge protection, no filtering, no regen please...

You cannot really protect from strong direct hit since it creates plasma 1 foot wide and you need very thick wire and grounding rod to return it to earth, but any protection is better than none (protects from line spikes and indirect hits). I would unplug (if I'm at home) and if you have roof antenna - ground it. Metal structure on asphalt shingle roof gets charged by wind (static electricity) to thousands of volts and your house looks (electrically) like skyscraper.

You can purchase a whole house surge protector from Home Depot for about $75.00. It gets connected directly to your breaker box. Has green and red lights. Green good Red replace. Most serge protectors are good for 1 hit only and must be replaced. Contrary to popular belief that they reset themselves, most do not. If you talk to an electrician he should be able to get you one with a module that can be replaced.

I would be skeptical of any product that claims to prevent a direct lightning strike. Lightning ranges from several hundred million to a billion volts and up to several hundred thousand amps. Good luck stopping that kind of power. The "surges" most consumer products are designed to prevent are the minor fluctations in power from your power company. I use a Furman Elite 15 for "surge" protection and when lighting is in the forecast, I unplug.