On the technical aspect of things,speaker cables and IC's should be the same material[conductor,insulation] for optimun performance and coherence.Since cables have better chance of matching these factor from a same manufactors than a different cable company.For entry hi-quality playback music or HT i think it'OK doesn't hurt using cables from the same company.However,for top flight system i'd try to reserve the integrity of the original signal as far down the system chain as much as i possibel can.
