Thanks everyone. Some great advice.

I will set up the qs8s as mojo suggested and sit on the m22s for now. Hopefully the roller blind won't mess with tone of the qs8s too much. Maybe mount one on the back wall. I'll mount the 150 below the tv.

Re the tv, yep. The mounting bracket was already there. Once the sparky moves the power point, we should be able to tilt it down a bit.