Have you looked at any of the IOR VALDADA or FALCONOPTICS offerings?
I have a couple IOR scopes that are crystal clear with the M8 reticles in 2.5-10 x 42 with 30mm tubes and target style turrets. They don't have AO, but they don't seem to need it either, no trouble with minute of coyote out to 400+yds as long as I do my part.
I only have one Falcon, the Merlin model, 4-14 x 42 with 30mm tube and their great mildot open crosshair reticle along with side adjustable paralax an target style turrets. It's mounted on a T3, 6.5x55. and is absolutely reliable and consistant in any temperature, even after slipping on the ice a couple of times and falling on it. cost $800 appx maybe cheaper now that the Can dollar is higher.
The Falcon is the cheaper of the two and has yet to tested at -40C on a proven accurate rifle. The rifle it was tested on is basicly a test bed unit that delivers 1min groups on a reliably consistant basis. So far it all looks good. Next it goes on a T3, 25-06. It also has more accessories packed with it than any other scope I've come accross, like screw on lens covers,light shades and an optional use 4 in wheel that fits onto the paralax turret for ultra fine adjustment. cost - appx $400C
bearhunter