The step-up from the Viper I'm running would be something in the Razor line. I'm pretty sure that the Swarovski Z3 Paul D is running is a step up from a Viper as well. Not sure which direction I'm going to go yet, as my scope research has been deprioritized as I focus on my (first!) upcoming turkey season. I'll highlight again though that my personal experience is limited to one white tail season, and I'd totally defer to Dualist's comments on the presence of solar flare. I may upgrade and wind up with the same issue in a more expensive scope, and I've had no other perceived issues with the Viper HS.