John in my view you should go with the 3805(or if you'd want to save some money, the 2805). All three would give him equally transparent amplification, but the 3805 would make things easier with automatic calibration and equalization(microphone about $60 extra with 3805, included with 2805). The 3805 has very powerful amps, which, as is typical, exceed their power rating.

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Enjoy the music, not the equipment.