Project Cars (& PC2) are great for audio. Also StarWars Battlefront since I see from COD you're playing first person shooter. The thermal imploder weapon in BattleFront is awesome for the sub.
Be warned if you get into VR however! Because of the positional 3D sound interaction with head position and the headset, you're fancy shmancy HT becomes unnecessary. I had a hard time accepting this when I got to play on an Oculus Rift with good headphones a while back. It was setup in my HT and my big UHD TV was just a secondary monitor for people to see what the player was doing.
