Power Conditioners

iFi AC iPurifier is $100 each and work very well. I would start with 1 or 2 of those. Highly recommended.

I’ll give another plug for the Audioquest powerquest.  I just bought a powerquest 3 on sale for my parents system.  They have some Focal Aria 926.  We all felt like the sound improved after we plugged all their gear into it.  Especially in the low end.  It seemed fuller.  It’s tough to quantify.  And I do worry about confirmation bias.  But you get peace of mind, and a warranty to boot from Audioquest.  And you don’t have to shell out more $ for another plug since the unit comes with one.  What’s not to like?  

I love music, gear is too expensive

I got Richard Gray 400 pro in my main system and Audioquest Powerquest 3 amp in my secondary system and very happy with both

Here's the most brilliant bit of marketing I've ever read, from the Pangea page, listed by the OP:

There are zero current-limiting circuits or electronic components of any kind inside."

The Furman conditioners with LiFT and SMP have lots of components which protect you against surge and also reduce noise starting at around 3 kHz.

If you want a "straight wire" with nothing changed, may I suggest the much cheaper kit from Parts Connexion:

https://www.partsconnexion.com/connex-kits.html

Personally, for $200 I'd rather have a Furman PST-8 which actually protects the equipment and reduced audible noise than a fancy box for power outlets, but that's just me.

https://amzn.to/2WKNjwB