mbyrnes
500+ Head-Fier
I actually ended up switching back to the regular Dolby surround of the Mixamp. While Sonic does sound more realistic, in certain situations the surrounding noises that I was listening for were way too close to me even though the person making the noise was not that close. Therefore, I would be kind of thrown off as to what the position of said person was. Everything is much louder and clearer with Sonic but sometimes everything sounds too close to you.
EDIT: I actually ended up trying Atmos with the Focal Utopia (which has a intimate soundstage usually not the greatest for gaming) and the combo actually works surprisingly well. Will be experimenting more with this.
Have you tried a UHD Blu-ray with Dolby Atmos headphone enabled (playing the UHD through the Xbox One S?)