I wouldn't say the Denon's put out that much more power per dollar. Remember, HK (like NAD) gives very accurate ratings. If it says 55 watts X6 then you will be able to get 55 continous watts to each channel. While I believe Denon is more honest with their power ratings than say Onkyo or Sony, I doubt if my Denon which is rated at 6 X 90 watts actually puts out 90 continous watts to all 6 channels. I'd guess between 70 and 80 watts if tested.