I am confused about the different speaker options that are available to choose from. I use my Beovision 7-55 connected also to a projector and sometimes I reverse the sound image to the projector screen. I use Beolab 7-6, 2 x Beolab 1, 2 x Beolab 8000 today.. Options are: 1. None 2. Front left 3. Front right 4. Left Surround 5. Right Surround 6. Left rear 7. Right rear 8. Rear center 9. Center 10. Left center 11. Right Center First let's clear out if this tv has 5.1 or is it 7.1 surround? When to use rear center, left center and right center for instance? Anyone that has knowledge of this?