As I was researching which cable to get for my new speakers, I came across this article, http://www.roger-russell.com/wire/wire.htm quite interesting, have a read, it's a bit long but worth the effort, especially if you're bored at work, anyway, my conclusion - I'm sticking with the cables that came with my Swan Diva 6.2, here's his conclusion -
We have been told by advertising that the exotic speaker wires offer fabulous advantages over ordinary lamp cord. It would seem reasonable that using this same wire for lamps would also enhance their performance. In the same vein as wire literature, you can have your lamp reproduce light with the full spectrum color fidelity of natural daylight, finally allowing you see light the way it should be seen and bring out the natural performance of your lamp. It could offer greater warmth, detail, brilliance, definition and speed by providing wider bandwidth and reduced skin effect. It can provide a distortion free illumination that reduces eye strain, resulting in clearer vision and optimal color perception. It can allow you to work for longer periods of time with less visual distraction or fatigue. Just imagine what it might do for your electric razor or microwave, etc.!