While I am a firm believer based on audition that high end component to component connections (phono, USB, interconnect, and speaker cables) and power cables make a substantial improvement in sound quality, I have not found that difference in wall to modem/router connections. I had a substantial spend ($800x2) on high end RJ45 and BCN cables for that purpose. Discussing the subject with the designer of my component and power cables, he said there was no reason for that spend on wall to modem connections/router cables. A good quality CAT 8 cable will give equivalent performance as long as you avoid hardware store cables. My high end RJ45 connector had metal housing parts. Discussing a perceived treble hardness with Aurender and the cable designer, they both said that all plastic housings are recommended, and metal in the connector is not to avoid potential RFI. Both recommended trying Blue Jeans with all plastic housings. I did and can verify that they were correct. Sound quality was equivalent or better in that hardness alleviated and the design, while as not as visually elegant, appears more rugged. The expensive cables now sit in a closet as a backup. So my recommendation is to not buy hardware grade cables, but also not buy high end cables for wall to router/modem or even router/modem to server/streamer connections. Go with a moderately low priced but good quality CAT8 cable like Blue Jeans. This info is based on my experience and recommendations of Aurender and the designer of the component and power cables I use. You should audition. Always use your own ears. If you buy a high end connector and hear benefits, go with it. If not, spend the money on something else.