Bob, as far as sound quality goes, a watt is a watt. Clean power is cheap these days and there's no problem in finding ruler-flat 20-20Khz response at inaudibly low distortion levels. More expensive equipment may handle loads of 4 ohms and below better and may have a longer life, but won't sound any better in ordinary circumstances. Get the features and amount of power you want at the best price you can get and don't worry about nameplates.

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Enjoy the music, not the equipment.