Coppper and silver have nearly the same resistivity -- copper is maybe about 7 or 8% worse than silver, hardly worth the price difference of using silver for a conductor vs. copper. Gold isn't much better of a conductor than aluminum. Gold's only advantage, as plating, is that it doesn't corrode.
If you want plated connectors, silver is the way to go for plating. The oxide of silver is conductive, which is why the high-end connector used by the military are silver-plated.
Audiophools (the "golden-eared" crowd) will buy into anything they think will make their system sound better, regardless of the price. They even buy into the idea that the power cord for their amplifier, if made of specialized wire, will cause the amplifier to sound better. There's an audiophool born every minute.
Dean