Try flip sofa vertically and place equipment at long wall. May be the sofa will be less, may be it will be two sofas or sofa and armchiars. Between the big window and the sofa should be not less than 800 mm.

I think it's in the best spot where it is drawn - but I would be inclined to have it either on a swivel pole rather than off the ceiling - as it needs to be low enough to not give you neck ache watching it from the sofa - or on a tilt and turn bracket on the wall - also you need to position it so that the overhead lamp won't be in the way too !! :-)

Agreed with OnePlan, the current TV location looks to be the best spot in this situation.

Sounds as if you need a place to store your components for audio and video. Put them in a closet somewhere else then run cables thru the wall. There is a special consideration when the distance is more than 6 feet. HDMI cables need to have cat6 instead of cat 5 cables.
If you need info, I can look it up. Two of my neighbors had long convo on email about how to wire to a remote closet. All of there media for the whole house is in a single location.

Blue that is exactly what I need:)