Cam, there's validity to what the rep said only in that there're no 120Hz transmissions, but that has nothing to do with the LCD sets that are "120Hz", so the rep isn't well-informed on the point. Those sets take the incoming 60Hz signals and insert an extra mathematically interpolated frame between the "real" ones, with the result that any motion that occurred between the actual frames is made less apparent.

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Enjoy the music, not the equipment.