Alex, as I and others suggested to you in a earlier thread, your 2200 should have plenty of power for the M80s in nearly all uses, and this apparently is the case for your use. So, there's no compelling reason to get a new receiver for reasons of power, but the features of the 2200 are a bit dated and if you want changes made in those a new model could be justified.

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Enjoy the music, not the equipment.