Where did you find information that says that Pioneers have better sound quality? Did someone actually run both of these decks through a noise ratio or at least an oscilograph? I'd love to see that. Until there are hard numbers, it's just an opinion. From my personal experiences, Pioneer 600 mixer, which is considered defacto by most clubs, is probably one of the noisiest on the market. A sub $200 Berhiner DJX 700 produces significantly less noise, you can actually hear the difference by ear. I own both.