After a similar strike a couple years ago, I re-grounded the house (not sure of the technical term for that but it involved very long rods going very deep into the ground), installed a new whole house surge protector, re ran the antennae wiring with grounds, and replaced my rgpc units with ps audio p10s. I'm not sure I get any more surge protection out of the p10s, but they really improved my sound quality.
There are many here who know lots about this, so I look forward to their responses.
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