I was using neutral reference interconnects and cardas power cords in my system (tubes) for several years but changed to varial, ash, mother, and wax cables about four years ago. I like a lot of detail and found the neutral reference to be too mild or flat for my taste, whereas the zu cables provided the detail I was looking for, and the price was right. I then added a pair of bybee quantam purifiers ahead of the speakers and have been very satisfied ever since. There are many cables that would work as well or better, (how much better is the question) but I cannot afford the trial and error process. Also, the guys at zu are great to work with.