I am getting ready to get 2 more Energy Take 5.2 speakers to make for a 7.1 setup. Would be a problem if the rear speakers can not be right in the center and equidistant to the seating area due to a door and a window? I have 2 possible locations for the left surround back. Which would be the best one? I have attached a picture with the speakers in what I think will be the best locations. Anyone else have any ideas? Should I toe in the back channels a little bit? Are they too far apart? Thanks for any help.