New home, open floorplan, not ideal for rear position of Era 300.  Joining Arc and Sub4 under 85” Samsung in front of room.  I’d like to place Era 300s on stands beside the primary listening position, realizing speakers project to sides, that would be mid-surround and rear as well as ceiling 8’.  See positions A as desired.  B is textbook, but not doable.  C is 15’ away on back wall across dinner table.  What do you think? Can the technology of the 300s and TrueTune still produce an effect worthy of the prices?  Thank you!  ( I primarily watch sports and action movies.)