Hello, quick question. How much discernible difference will there be between 105 and 125 watts per channel. I have the 3313 unopened but have thought about returning for the 2313 to help offset the price for a sub. I have 2 klipsch RS-82 for fronts and a RC-62 for my center. I really have no need more multiple zones and my family room is 14 x 20. The tech at Frys says I need the power to drive the speakers but I'm not so sure. Thanks for any advice.