If you want to be full proof, just keep your interconnects as short as possible and your speaker cables below the maximum length based on impedance and AWG.
Cables are like a bridge for the audio signal and electrons to cross. Make sure that bridge is not too long, and you should be fine.
And besides, I have never heard of an audio component company or speaker company being able to guarantee maximum system performance with a particular brand of exotic speaker cable. If this was truly the case, then why don't they tell you?
Afterall, a manufacturer who wants maximum profits for their audio components and speakers would want their gear to perform well! So if word gets out, more people buy = more money for them!
Get my drift??!