The wonders of expensive cables are an endless source of amusement! Now, back on topic..
Think you'll find that most people consider speaker wires to be good enough as long as the gauge is heavy enough. EMI is not a problem here.
For normal wiring, a standard good cable, not expensive esoteric ish and not cheapo crap, should give you a long hassle free service time. How good is good enough? Well, to me, that means a braided shield, twisted pair and a physically sturdy construction. Get some good connectors, like Neutrik, and you should be done.
If you think there's reasons to throw piles of cash at cables, please take a look at circuit board traces..