I only added the wides to my setup because i bought M80's and had the M2's hanging about. I really cant say one way or another if they make much difference in my small room.I will be checking out all of its features probly on the weekend and try some of its dsp modes. The Denon uses its own proprietary width and height system.The denon doesnt have any of the dsp modes yamaha offers. I use a xpa 3 for my fronts/center and the surround run off the reciever so power is not an issue.Glad to hear you like your yamaha,this may be a keeper only time will tell.
