Not the speakers,for sure! I am losing mine because I've less space around them which compromises the sound to much. If I had the space you do,I'd choose no other speaker..they are AMAZING! And at used prices,an incredible bargain.
Great looking system, I am hard pressed to say, change this or change that. There is a lot of open wall space behind the speakers and the window presents some issues. I believe that you may benefit from some acoustic treatments on the walls and a heavier curtin over the window, these should work to resolve some reflections and tame the overall sound of the system. Great job selecting components, well done.