No one talks about Purist Audio Design cables.

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.

And believe it or not, I still use the original Purist Colossus fluid speaker cables. They are probably over 30 years old, I had them refilled with the fluid twice by Purist, more than 10 years ago the last time, I think, and they are an excellent match for my warm sounding speakers. Colossus used to be Purist's best value cable, no wonder you can't find it. I mean with fluid, at some point Purist stopped refilling old cables with fluid and offered to fill them with Ferox. I tried it with RCA interconnects and Ferox completely screwed up this cable.

Yeah it’s a shame. To beat the Aqueous it took a much more expensive Audience speaker cables.