Hey Cam you have a unique install situation. I would recommend not installing in walls in your room. Since you spend a lot of time in bed, you could in theory build a system around a nearfield multichannel bedpost setup. This would require smaller speakers mounted around your frame integrated into the bed posts themselves. This way you are guaranteed the same result, wherever your bed is setup. Since your listening distance would be reduced, you can get away with much smaller and lower output enclosures. This would save money as well.

A 4 poster with taller posts at the top of the bed would be your path to modular atmos with a quality HTIB package. smile An inverted U shaped setup at the foot of the bed would allow an articulating TV mount and your speaker locations. If you were smart about it your costs would be similar to what you are thinking of doing with inwalls. Less hassle as well for tweaking later. smile

11/4" emt conduit bent at a local electrical company would be a cheap and sturdy post setup. We have the odd dad get us to bend up hockey posts. smile