Audio Magic makes some really amazing cables which are not the least bit harsh once they are broken in. I had their top-of-the-line power cable that I tried in my home theater room to power my 4K projector and (wonder of wonders) it improved the picture quality measurably. In the projector wars, there's a lot that is made out of small incremental improvements and here is a cable that makes as much improvement as spending a few thousand more for the next model up.
Silver 'done right' will improve the perceived transient speed in an audio system as well.