No one talks about Purist Audio Design cables.

I use Purist Cat 7 Ethernet cable. Really like it. 
Tried the Neptune Diamond Revision power cord and hated it.

I have Neptune Luminist Revision RCA interconnects and like them a lot. But it is not exactly neutral cable. Wywires Diamond is overall  better but Neptune has its charm. Huge soundstage and tube like qualities.

The Neptune power cord resulted in very dark and rolled off sound. 
I used to own Aqueous 20th Anniversary speaker cables for years and yes they were warm sounding but resolving and articulate at the same time. Very musical. I think the liquid shielding in Neptune is too much of a good thing. 
The Cat 7 Ethernet cable is excellent though and I have no plans to change it. So in my experience it’s a hit or miss with Purist. 

If I remember right, Aqueous uses Contego which is sort of a mixture of fluid and Ferox. Never tried them, though.

I use old Dominus Ferox power cord with the VAC Avatar SE tube integrated amp with great results.