I have a Zeiss conquest and a Vortex Viper. After looking through Bushnell Nikon Vortex and Zeiss I thought the Zeiss and Viper were the best. I did however find a post on archerytalk saying that the Vortex are bad quality scopes and that's why they offer a lifetime warranty. I cannot confirm nor deny but found that interesting. Then again I've heard Leupold has terrible customer service so who knows. Nikon has the Laserforce which has a lifetime warranty. However there's some discussion on what that warranty covers. It's under no fault but summer saying that it doesn't cover everything just the optic part. Life is too complicated.