Sorry for, but...I just saw the Sony announcement of the release of the STR-DH790 which looks ideal to match with the Q50a's. It's not out until Spring, so I'll have to wait a bit unless I the STR-DN1080 gets discounted more. One thing I've heard is that sometimes the bass impact is slightly diminished with an Atmos set up, is there any truth to that do you think?
STR-DH790 is a much lower model vs. 1080 (only 4/1 hdmi`s and less power etc.) The price of 1080 will come down at early summer when 2018 models (DN1090) will be announced. Though you can get the Denon X2400 and Yamaha 683 now cheaper. Don`t put too much weight on that WhatHifi review.