I have a 5.1 system with 5 floor standing speakers. I have the 2 surround speakers near the rear corners of the room. I have 2 smaller matching speakers that I will use as the rear center channel. When I set up the rear center channel, my current larger surrounds will be labeled side left and right accordng to the processor. Will I need to move them from their locations? A guy at the local AV store said that I need to buy small dipole wall speakers for the side channels and not use the large surrounds. Doesn't that defeat the purpose of having full range speakers? Will a 7.1 processor realize the difference between 7.1 movie mode with dipole side speakers and a 5.1 music mode with large direct radiators? Thanks in advance for your responses, pete.