I have seen far to many Leupold go down when they were needed to ever trust another. I'm not talking about low end Leupold, I'm talking about vx5 and vx6 both. They have serious erector system issues that are well known. I absolutely love their glass and features but I can't in good conscience trust them. I have personally sent a vx5 and vx6 back for loss of zero and tracking issues. Their warranty is great but I've used it to often. Zeiss was way ahead in their v4 series than nearly anybody else in the market at price, weight, optical clarity and tracking. My only complaint is the unmarked parallax.