What kind of surround sound speakers do you have? If they are bi-pole or dipole speakers, you may be good to place them right about at seating position center. Also about 1-3 feet above seated ear level.
For direct-fire speakers, I would suggest you place them slightly behind seating position center (2-3 feet above seated ear level). Also point them diagonally forward and across the seating position. I think you will be happy with the sound.