@fleschler , it is funny how we seem to have followed similar principles but you have the "custom" version with a purpose built room. Those absorption panels hanging from the ceiling are often called a "cloud" in the studios. I have an acoustic "cloud" of diffusors (auralex acoustic lens) hanging below my PJ in the back third of the room. I don't have a pic but this gives you an idea. This pic is NOT my room, its a studio. These are the panels I use but this gives you an idea:



