don't knock it until you try it. Most of the skepticism is built around fear of wasting money on useless upgrades. If you don't have the luxury of borrowing a high end cable, buy a used cable with a high resell value (virtual dynamics, nordosts, tara labs, michael wolffs, black sands, etc.). in case you do decide to part with it, you won't be losing out too much. before you judge, don't base your opinion on cynism, base it on trial and error. But if you really can't hear anything, that's good for you, less $$$ to spend on this ridiculous hobby.
Getting back on subject - No, I'll dedicate 10-15% system on cables.