Upgrading Speakers Changing Existing Speaker Placement

[burts]

Im upgrading to polk lsi 15, lsic, fxi4 surrounds(2 pairs) This is where my existing surround and rear surrounds are placed. My main seat is the recliner on the right directly in front of my tv.

This is my Rear Surrounds, Side surrounds
Should I put my rear surrounds right behind my seat instead of the corners, back wall behind my seat is less then 2 feet away
Should I put my side surrounds closer to my couch on the side walls, seen in 3rd picture on the right side of the doorway instead of the left?

[20hz]

I think the far cornors are the best , if you go low and behind the couch you will have a hard time balancing them , they will always sound closer and you will loose the depth of surround .