If it`s one of those yanky ziess i wouldn`t bother. I fancied getting one about 4 years back now and rang sportsmans to order one, fortunately they hadn`t got the one i wanted in stock. The next time i was in the gunshop i had a good luck at a ziess and was really surprised at the lack of quality, especially when i took the turret caps off and had a play with the adjustments. It had a very sloppy feel to it and it didn`t seem to click properly, so you couldn`t tell if it had moved or not. I fancied trying something different as i had already got a s/b on my other rifle but in the end plumped for another hungarian 6x42 s/b.
My advise, try to go that extra £100 and get an hungarian s/b, you won`t regret it. wadashot
Forget either of them, go for an SB (as wadashot says, though I'd say go kraut if you can afford it) and you won't go back. Two stalking buddies of mine bought an SB after looking through mine and trying it on a stalk and on the range (one changed from Nikkon the other from Leupold) and a third is considering changing from a Zeiss to one. My only experience of Leupolds is buying one only for the illuminated reticle to fail on first use, then the repair to fail, then the whole reticle moved on about the tenth shot I made. They have loads of nice features, like screw in lense protectors and all that, but don't seem well put together. I got fed up and changed it for the Schmidt at much extra cost and haven't regretted it. Sometimes you get what you pay for.
Can't argue with that I had leupold V111 3.5-10x50's on my rifles. I have now swapped them for 3 x 8x56 Hungarian S&B's and 1 8x56 Hungarian Illuminated I've even got one on my .375 H&H( WildBoar Rifle) excellent optics and value for money. I had a 6x42 American zeiss once quite nice optis but felt cheap. After saying all that if I wanted a mid priced vari-power I certainly would consider another Leupold the one on my .308 never let me down in 7 years hard use.
Got VX111 4x14x40 and Ziess Diavari C 3x9x36 (alas no longer made).
Ziess is by far the better, I would never have another Luepold but in fairness to it it has never gone wrong and is fine in good light. I also have a 50mm Swaro and the Ziess is better than that at night.