In the opinion of most people, provided the cable is copper strand, and of sufficient cross sectional area for the intended use, you will be unable to hear the difference between 2 different brands of speaker cable of the same size. This is also borne out in blind tests.
Sometimes when people spend silly money on RCA and speaker cables, they merely convince themselves that they can hear a difference, to make themselves feel better about the cash they've just wasted.
If you are running speakers directly from the headunit, the standard wiring will be sufficient.