Ok, i need help choosing out a scope for my rifle. It's a tikka t3 7mm rem mag, with a26" Walther barrel. I plan on shooting hopefully out to at least 900 yards. I have a vortex viper pst 6.5-24x50 ffp, and a Leupold Vx6 3-18x50 with a duplex firedot Reticle. I've used the vortex for the last 3 years and i like it, but i dont like the open windage turret. Which Scope would you prefer? Thanks