@wyoboy - In my system, a Waudio 10AWG power cable made a significant difference for my amplifier and both Chicago and now Sydney interconnects from Audioquest made a significant difference between my DAC and amplifier. I have some other cables in the system, but really believe that these two made the most (if not all) difference. I’m not one to spend hours swapping things to verify everything to the Nth degree. I tend to decide what I want to upgrade to and if I don’t hear anything to the contrary I just go with it. The two cables above made immediate improvements in my system that were as significant to my ears as tube rolling has been in my Pathos Classic One MkIII amplifier.
I struggle to really describe the changes, but the change is signicant enough that I can "hear it" even on recordings that I have not listened to for a long time. There's just a dynamic and depth that wasn't there prior to the cable upgrades.