Demetrios, for a single move, I agree that it should be the VP160 center speaker. I don't, however, think that there would be any need for concern in running M80s with your 3808. The M80s are given a 4 ohm rating, but this is in effect over a bit less than half of its frequency range, and an overall average might be about 6 ohms. In any case, users have had no problems at safe(to your hearing)sound levels running the M80s with units similar to or a little less capable than the 3808.

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Enjoy the music, not the equipment.