EriK, I was of your OLED screen in making the comment of the dark drape behind. It will really make your TV pop. Retractable screens are a no, no. They never stay perfectly flat. A proper screen needs to be stretched in a frame and hung on the wall permanently. We are in the process of remodeling our media room and will be painting the walls a very dark blue. The carpeting is a very dark chocolate brown. When we are done I will show you a picture with the projector on. It is going to look very slick. In reality projector's can be a real PITA. Bulbs low every 2000 hours and they only look really good for the first 100. During the daytime you never get a really good picture unless you can totally blocked out your room which I cannot do. The solution is one of the newer laser projectors but the technology has not come down to a reasonable price point yet. Patient is virtually.
Good luck with the speakers. I assume you have a calibrated microphone for measurement purposes and a computer program supporting, truly the only way you would ever know what you were doing. Keep us informed. I would love to see the grafts.