I have all Wireworld Silver Electra 7 cables with reference ends on all my gear, i am very happy with the overall sound. My dealer gave me 3 different Wireworld power cords to try for a week, and i found the one that suited my ears best.
On my second system, I have a mix match of cables, I have slowly started to replace them so they are all the Same. Find what suits your hearing and room, end of story.