Larry, your 5660 will have plenty of power unless your listening room is huge. Remember, the difference between 85 watts and 130-150 watts is only about 2db(e.g. the difference between 115db and 117db on peaks)so don't worry about it.

Incidentally, my own Big 10 time was in Ann Arbor, so that's the way I go in college games.

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Enjoy the music, not the equipment.