Re: For those who have used a Z5 and Z6
I haven't tried the Z6, but I have a Z5 and can offer some impressions.
The glass is great; good color, great clarity, great low-light capability, especially considering that it is a 1 inch tube.
It's also a very light weight scope, especially good if you are counting ounces.
The one thing that might be a drawback is that the turrets have limited range for adjustment. Not surprising for a 1 inch tune, but if you get the Z5 I would recommend that you get the BRX/BRH reticle and plan to hold over rather than dial. If you really want to dial, get the Z6 (but it will be heavier)