I'd opt for the Zeiss. I currently own two Conquests and over the years have owned numerous Leupolds, including the new VX II and VX III. I've just been more pleased with the Conquests than any scope I've ever owned. The optics are just plain better and they seem to be very durable too.

As far as service is concerned, well, I can tell you Zeiss takes a back seat to no one. Due to my own blunder, I damaged my 4.5-14x44 Conquest when I let my rifle drop to the paved parking lot at the local shooting range. I sent the scope back to Zeiss with a letter explaining that the damage was all my fault. In just over a week's time, a brand new Conquest was delivered to my house. That's just great service in my opinion.