I am satisfied with the earbuds that came with my zen nano, but I keep reading about the improved sound from aftermarket upgrades. Maybe I am not that discriminating, but before I spend more money, I would like to know what measurable improvements I could expect. I would pay for improved clarity and better bass and volume. Can anyone steer me to a product that would do this for under $50. I suppose with Circuit City's and Best Buy's liberal return policy I could actually test ride a new pair.
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