Subs?

@goducks44   I have a similar sized room and my mains are the Magico S3 II's.  I also went with the Audiokinesis Swarm Sub system as has been mentioned many times in this thread with amazing results.  They truly transformed my system.  I worked with Duke to get custom stained veneers to match the furniture in my dedicated listening room (Stickley Mission Oak) on the four subs.  They integrate beautifully and the two that are in my line of sight double as plant stands!  Can't recommend them enough!

I like it when I can feel the tanks approaching on a battlefield.  Main speakers can't do this very well. Make sure you secure all the picture frames on the walls.

I love the 804s.  And all other the stuff you have too. The sub or subs will be a nice addition.  

Quality over Quantity. REL T/7x. I have one in my room and it integrates seamlessly with my monitors. I see no reason why I would need 2. My room is about the size of yours and the T/7x pressurizes it just fine. Bass slams you in the guts and sometimes vibrates the whole couch. Queen Mary by Francine Thirteen will make your whole body vibrate (powerful low 30s Hz).