Once you're comparing products with similar quality amps, room correction will impact sound quality more than anything....by far, in my experience. I specifically chose my last two receivers (Marantz, Denon) because of Audyssey MultEQ XT. Unless you have a great acoustic room already, Audyssey will make a leaps and bounds difference. I can't speak to YPAO, but if it doesn't EQ the sub, that would be a dealbreaker for me.
5.2.2 HT: Denon AVR-x3400h receiver, Definitive Mythos speakers (One’s front, Three center, Gems rear, Di 6.5R’s in ceiling), Dual Rythmik FV18 subs, Samsung UN82MU8000 tv, Samsung UBD-M9500 blu-ray, Sonos Connect music streamer