Very nice.
I might consider diffusers for our one side wall (which is presently devoid of anything), however i like them more for the aesthetics, like art on the wall in a HT room.
I would have to weigh their sonic influence vs. my preference for the art deco look they provide to the room. However i suspect the sonic change may be more balanced since on the opposite side of the room we have heavy curtains over a door.

"Those who preach the myths of audio are ignorant of truth."