My experience has been that there is a really broad difference in sound quality between processors, and I encourage listeners to keep both an open but skeptical mind about them.
Onkyo and Marantz are not my favorites. Onkyo worse by a lot, Marantz bright and hard. Emotiva same as Onkyo but haven’t listened in forever.
The current generation of Anthem does OK, but my very old Theta Casanova, which was a pure digital preamp, would still beat all of them for sound quality. Honestly even my low end Oppo BD player sounded great compared to most modern processors. Shame I had to use a 6 channel preamp to hear it.