Denon vs. Onkyo vs. Sony — which brand is most reliable right now?

Across the home-theater subreddits we read, Denon's X-series gets the strongest reliability reputation, while Onkyo's current generation is praised for features (Dirac, HDMI 2.1) but has more mixed user reports on dialog clarity and firmware. Sony's STR-AN1000 draws praise for its Spatial Sound but multiple owners have reported audible hiss or slow startup quirks.