If your goal is to add more crispness on the top, then I would go with Audience Powerchord for the power cables. I have this pc on all my components now. I would also recommend the Sophias for the output tubes. The Sophias are not euphonic or "tubey" sounding. They are instead linear and 3D. I have the Modwright tube Oppo 83, which I thought was a tad too warm when I first got it. The Audience powerchords and Sophia tubes brought the sound of my rig back into balance.
What are you using for ic's and speaker cables?
What are you using for ic's and speaker cables?