If I upgrade it would be to the Denon 3600. Really don't need Dolby atmos. If I add a multichannel Blue ray DVD player to the Onkyo system it would upgrade the digital formats? The speakers are Definitive Technology fronts BP 2002TL, center 2300 and rears BP-2. I do have the ED-301 Digital Processor . Need recommendations on the Blue Ray player if thats an option. What am I giving up by upgrading the Onkyo beside dolby atmos and streaming capabilities releative to the denon. Sound difference? Genes comments on Onkyo started me on thing it might be enough receiver.