Check out Inakustik…good German brand and truly innovative cables…I love my silver ICs from them…best out several others in a listening shootout.
I have their 2400 Air speaker cables and Interconnects. The speaker cable is very good. The interconnect is also good, but a $200 coaxial cable I had was hard to distinguish from the inakustik. Another coaxial interconnect I had sucked. I threw that one out. I like my Genesis interconnect by Gary Kho too. The genesis is better between my DAC and pre than the Inakustik. But the Inakustik is the best between the pre and the amp.
I bi-speaker wire from my amp to crossover and use Inakustik on the bass and Graditech to the mid/high. So I have about $4000 in speaker cables. I also lash my crossover to driver with Gradetech to the the mid/high and Verstar silver over copper foil to the woofers. So another $1600 in speaker cable. Never thought about it, but I have about $5600 in cable to wire a $8K speaker.
I tried a few power cables in the $2000 to $3000 price point. They did not do anything better than what I have made. They provided a little different lens.
I have a $1400 USB cable. That little cable can make and break USB performance.
Ethernet is Blue Jeans. I like it more than the far more expensive options. The more expensive,,,,,,,, Not my cup of tea. I do not like the Gigafoil or EN-30. Both are HIFI sounding. I have taken the Gigafoil to 2 customers houses to try and rid myself of it. They say the same. Its HIFI. Kind of makes the sound do things that are not natural.
I have not experimented with my phono cables yet. I need to talk to Mike, although he plays in a different park than I do.
I added a Torus 4.5KVA wall mount to my system. Hands down improvement across the board. In a way not like the other rack filters I have tried.
The Deoxit was also a big shift to better.
I am swirling the bowl on a Shunyata ground box. I am convinced there is noise that is coupling to the equipment itself that your power cable is not ridding, because the equipment is not designed to let the power cable shunt it to earth. A rack filter or my WM Torus is not helping either as the noise is entering after they did their work.
I have tried all sorts of wire such as 8awg copper to #20 gauge silver wire to lash between the ground studs on my equipment. No change. But why would there. I only created a parallel path. I am seeing the ground box as the answer.