I've had recent experience with two of the companies that you mentioned.
When I bought my Acoustic Zen "Hologram" speaker cables I miscalculated the length that I needed, so the spades had a tendency to pop off at the connection to the amplifier. So, I decided to try a pair of used Kubala Sosna cables and I did not like them as much as the Acoustic Zen cables. Fortunately, the vendor provided a trial period to check them out, so I was able to return them.
Ultimately I ended up ordering a new pair of the Acoustic Zen "Holograms" that were 2 feet longer and had banana plugs instead of spades. I appreciate the Acoustic Zen's more now after finding out how much I really liked them after testing them against another product.
When I bought my Acoustic Zen "Hologram" speaker cables I miscalculated the length that I needed, so the spades had a tendency to pop off at the connection to the amplifier. So, I decided to try a pair of used Kubala Sosna cables and I did not like them as much as the Acoustic Zen cables. Fortunately, the vendor provided a trial period to check them out, so I was able to return them.
Ultimately I ended up ordering a new pair of the Acoustic Zen "Holograms" that were 2 feet longer and had banana plugs instead of spades. I appreciate the Acoustic Zen's more now after finding out how much I really liked them after testing them against another product.