Randy, Sean, good advice. Go cheap, and make any other cable prove its superiority before you spend your money.
I think it may be only after you make your own gear that you start to notice the limitations in commercial equipment. A good way to save money is wire - and it doesn't make a whole lot of sense to link two poorly wired components with exotic cables.
A note about experiments: as Randy notes, breaking the corrosion may be what everyone hears when a New and Better Cable is tried (new connection, no corrosion). Another thing is exact head position of the listener. I have made that mistake myself. The only sure way to do the experiment is to let someone else change the cables, or someone else to judge the quality. Head of the listener should be immobile for the duration of the experiment.