I will second @dekay's recommendation for the Micca cables. They're cheap enough to just try and see how they compare to your old cables. Or they can serve as a placeholder if you want to try other cables.
There are a couple of threads here about these cables. I bought them just for yuks after reading Steve Huff's review. I still prefer my Transparent cables on my main system, and my Anti-cables on my second system, but I could live with the Miccas. I listen to a lot of acoustic and folk music, and the Miccas do something special with midrange and vocals.