xpert1974

I intend to purchase a dts 6.1 system and have some consideration for the speaker placement. My listening area is abt 3 by 4 meter. I dun have any side wall for mounting except for the front and back. Is it ok if I place the surround speaker mount on to the ceiling with my listening position behind the surround speaker, close to the rear wall with my surround back speaker? I wonder is it better to go for 5.1 with the surround speaker at the rear wall or 6.1 with the surround speaker at the ceiling and surround back at the rear wall? Any comment on this? *Note. I will be siting very near to the rear wall......