Many nice gents in this site, highly reputable common folks audiophiles like @lalitk @wig and others have mentioned these, so it’s probably time to create a specific thread on Zavfino, a direct sales cables company based in Canada with presence ‘ distributors in US, also direct:

I took the advice of these folks with a power cord, the Prima MK2

I could not be happier with this cord, something that would easily cost $2,000 or even $3,000 from other better known cable makers. It’s outstanding, for about $500. Absolutely amazing build, and packaging too. It sounds great, very quiet. I am sure the cheaper PC, the Majestic at $390 is very good too: 
I now have the Prima speaker cables on my way. Call me “sold”.

No BS, truly top quality cables company that flies under the radar. Very affordable too. Take a look. No relation to the company, just a happy first time customer, thanks to my Audiogon friends here

I am using on my preamp. My 1.5 meter is not long enough to reach power amp. Plan to get a 2.5m for power amp.

For those who planning to get silver dart speaker cable for biwire-able spk, according to Raymond, Zavfino can make silver dart biwire jumpers but they will be 13AWG.

I am waiting for more update regarding the connector.

“I am using the Dart on my JL Audio CR-1 Crossover”.

Not the best place to use this fine cable, IMHO. 

Due to the length and the cables extreme stiffness, that is the best place in my system.