The reality is that for a home theater system (to which the 1070 is targeted) most people have self-powered subwoofers. If you are crossing over the rest of your speakers at a typical 80-100Hz then the power requirements of most speaker systems are easily handled by 65w. You will more likely destroy your hearing long before you need more headroom. Those for whom it might be inadequate would not be likely to be buying a middle range receiver like the 1070 in the first place. I would rather not have to deal with the cabinet heat issues of more unneeded capacity than to have the warm fuzzy of being able to drive a large full-range speaker system full bore.