Hi, I have always liked primary colors, I had a house with a rich navy wall and a dark red wall similar to your red, in the same room and it looked great. I find primary colors work very well with natural stone and leather furniture.
I would change the ceiling fan for a nice dark wood finished one, get a large turkish kind of rug with the dark reds and dark blues in it so as to tie in the speakers to the walls, and to the rest of the room. I would fill the shelves with books too. What I do is push some books in and pull some out of the shelves, and it works very well as a diffuser. Lastly I would get some dark natural leather Natuzzi leather furniture. Oh, and I would hang the tv above the fireplace, and get some nice heavy curtains in the same red, maybe velvet like in an old theatre, that you could pull over the tv when you are listening to music. I would play around with the lighting too, the lighting of a room can have a drastic impact on the mood of a room.
