I looked at those and ended up with a Zeiss HD5 3-15 with the Z800 reticle, on sale for a good deal it had the Ballistic reticle I preferred and I liked the glass better but between the Swarovski and the VX6 I'd take the Leupold, it really is easy to look through. If I was twisting turrets much I'd look at the Nightforce lineup but the Z800 reticle matches my trajectory perfectly all the way out to 800 yards on elk vitals size targets.
