HOGGHEAD,
Recently I played with a Nightfore with A.O., a Swarovski with S.F. and a Bushnell with S.F.
For me the Nightforce was significantly easier to tune to see the lines on the sheet of paper than either of the others. Since you are left handed, it should be a no brainer: A.O.
It was mentioned the S.F. has one more lens. That could be why the Nightforce was noticably better than the other two in low light performance.
