I am having trouble deciding which receiver to get. I am looking for some amazing sound and not have to buy a receiver for the next 10-15 years. Right now I have the rx a840 and it's ok, NOT AMAZING. Having top of the line DAC's and more power will make it amazing I will probably always stay with my 5.1 setup. For now my speakers are mirage os3 series, the floors, the center, and the sats as my surrounds. Please give me as much info as possible to help me in my decision making. Thanks