I must admit this is a good point, but would 32" on each side make much of a difference? And be worth patching the wall? kgallerie's suggestion to try the setup before going further is warranted I think. Just play a DTS, Dolby, THX or Datasat Digital trailer and listen in all three positions to see if it's okay like that. Move the speakers 32" on each side and repeat the operation to see if the situation is much better.