Gold-plated Banana plugs -- Are they worth it?

Contrary to marketing blurb, there is no discernable audible difference in the connection between a new standard connector and a gold-plated connector. The only situation where gold-plated connectors would be preferred is where there is a high potential for corrosion. If the connectors are going to be handled or if you are on the seashore, it is highly unlikely that gold-plated plugs will serve any better than standard connectors.