Surge protectors--how many $ make sense?

Some used furman 20 i on the music room now 1.5k but I would go open box

I have run krell fpb 6k watts into 1 ohm mcintosh 1.25k bryston 28 b3 and many hive 10 k watt class d into the 20 i and have never had an issue.yes I would prefer plugging them directly into the wall but don't want to lose a high dollar amp.the furman may Rob 1%of sound quality but that's the trade off.the 20 I has capacitors with>60 amp transients power so does audioquest 7000 but it's 11 k. Many furman 20 i in recording studios. Enjoy the hunt.read alot of reviews.the shunyata is a good one they cryo thier stuff to align the atoms to make electrons flow better.

I would also recommend a whole house protecter.  It’s definitely saved AV equipment and more over time.  

We had over 1000 lightning strikes in Sydney a couple of evenings ago. Many years ago, a surge protector with a large connected-equipment guarantee sacrificed itself.  It took a fair bit of argy bargy but they eventually coughed up.

We are still using copper for many internet connections, which can be a way in for strikes.  Also roof antennae for broadcast TV reception!

I have talked to my local dealer about trying out a Shunyata - Venom V16 Power Conditioner. If I don't think it makes my systerm sound $3K (including power cord) better, I can return it. But it's on order and I'll have to wait a while.