I bought a nice little silver cable on ebay for a good price and its also only 4ft long which I like much better than the 10 footer it comes with. I think I'm going to try and make one that's a bit thinker than the one I have but for what it is it works great.
As for the difference in sound I feel the silver cable is a little clearer sounding with highs that are a bit crisper than the stock cable but its not like its night and day at least not to me. That's why I want to make a thicker cable because I think it will amplify the qualities my silver cable already exhibits.
I bought a pure silver cable recently, compared them with stock cables briefly and couldn't tell any difference. Oh well, I need a shorter cable anyway, the stock one is too long for me.