RE: Best Light Gathering Scopes
Zeiss Conquest would be my suggestion based on the 3 I use currently. Theyprovide brighter/better resolution to the VX III's, to my eye.They've been rock solid in performance, holding POI and tracking percisely in adjustment. Constant eye relief/fast focus are great features as well to this scope.
The Nikon Gold mention compared well to me eye in testing but the weight was an issue for me.
Bushnell 4200 elite is a good one but as mentioned ER is limited.
Having owned or own 4200 elite, burris, leupold in the same class as the Conquest I think the zeiss is the best of the bunch.