IMO you can change the sound of your system for much less by installing filter chokes in your components (CDP, Preamp) and by changing a few resistors. My current system uses belden molded end power cords and Walmart extension cable for speaker wire and while I agree that all this makes a difference, I change components so often that I would make myself crazy mixing and matching each time. My preamp has a selector switch that allows me to change the sound to add more resolution, emotion, air, etc., similar to what some people describe their cables doing. If you are looking for resolution, separation, better tone, air, etc., that is what your components should be providing and the last piece of the puzzle IMO are cables.
Happy Listening.
Happy Listening.