Originally Posted by pbellsound
Bars typically don't have sound systems that allow you to discern the difference between good mixers and lousy mixers.
That's true, but at least you'll hear the better sound quality when cueing tracks, so you'll enjoy your set on a personal level more. Also, it's easier and more fun to mix with a quality mixer than some POS.
Personally, I find the newer generation of Pioneers much better sound-wise than the old 600's or 500's. The difference is quite big imo. Still not near the level of the high end mixers, but at least they don't totally suck.