You can check out my system.... I use BetterCables. I tried really really expensive ones and never heard a difference between them and cheaper, well-constructed cables. Personally, I would be really careful about wasting money on cables unless you are 100% certain you hear a stark difference while blindfolded.
I hope you don't make the same mistake I did initially and buy stuff you don't really need. You could easily put that money into better investments, such as actual playback equipment, or best yet, higher-end speakers.