I am looking at a minor receiver upgrade from my Denon AVR-S750H. It has been serving me well for my room size, but I am upgrading my main speakers and giving my older speakers to my daughter, along with the AVR-S750H. (I got it for a steal at $399CDN on Boxing Day almost three years ago, it owes me nothing. Still can't get them for that price now!)\nAnyway, I am wondering what the advantage would be for upping to the X series from Denon. My 5.1.2 system may go to a 5.2.2 at most, if I ever stumble upon a bargain. My main consideration is sound quality. Do the X Series AVR's actually sound any better? If I have an S Series now and am satisfied, what would I gain? 50\/50 Apple Music\/Streaming video.\nI know Audessey XT32 is one big upgrade. Independent subwoofer outputs is another, along with more wattage.\nIf I ever do add a second sub, it would be another SB-1000 Pro, so there would be the possibility of EQ'ing them separately with REW, then just plugging them both into an S Series AVR without independent subwoofer outputs, but that is less than ideal and I'd have to buy a UMIK or something.\nAs for more wattage, seems fine now, but is this all a case of I don't know what I am missing, or am I being up-sold, and won't notice a difference?