L7, you might be thinking of a couple of occasions when I pointed out that the 985 is identical to the 2805(except it's only in silver). The 3805 does have some differences and this chart compares them. Do your own evaluation, of course, but in my view the differences are minor and the 2805 is more cost-effective, especially since the microphone is included, while it's about $60 extra for the 3805.

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Enjoy the music, not the equipment.