Specifically, Dark Side of the Moon. Which one sounds best? A) Dark Side Of The Moon B) Dark Side Of The Moon (Ltd Ed) (Remastered) C) Dark Side of the Moon [GOLD CD] I have heard the Gold, but it wasn't A-B'd...so I don't know the difference. In general, how do these Gold discs sound in comparison to their normal counterparts? What makes a GOLD disc "gold"? Thanks.