Well, let me respond to it myself....
- Since a few weeks I use the Revelation Audio Labs CryoSilver Reference CAT8+/RJ-45 i2s Ethernet cable between my North Star Design cd transport and NSD extremo dac. It beats every ethernet cable I used before. A perfect match. I used the cat 5 of Revelation audio before. It got broke because of the cheap connectors after a few years. I tried several other cables. From cheap to expensive but it didn’t work out well. The great soundstage and 3 dimensional experience I didn’t got back. It was very frustrating. Even tried a used White Gold of North Star. At the end I bought the new Revelation Audiolabs Cryo Silver Reference Cat 8 Ethernet cable. Good Price as compensation for the old broken one, good communication and fast delivery. The sound is incredible even when it will take some more time for totaly break inn. I am very happy with it. The perfect match. Sorry for my poor English.