Koh, Id like to know where you read the bad reviews at so I can go read them. What model was it about? Not doubting you at all, I just like to read reviews about products I own or intend to own, and havent seen the ones you speak of on any forum or magazine I read.
I have heard of a few problems with the Crossfire models turrets, but they've redesigned it now and fixed that issue. I have yet to read a negative post/review on a Viper though.
I have 4 of them also(6.5-20x50's), and have gotten atleast another 8-10 for friends who have liked mine. Everyone of them are very clear,and track absolutely perfect. I have ran mine from 100yds up to 900 yds, everywhere inbetween, and back to 100yds during some prarie dog trips and have had no issues at all.
I highly recommend them, and at that price range they are hard, if not impossible, to beat. They also have a 100% guaranteed lifetime warranty(know a guy who dropped his gun out of the tree. It landed on and broke the scope. He sent it in and Vortex gave him a new one, no questions asked. And he told them how it happened.)
I compared this scope(actually all 4 of mine) to 2 different Sightron SIII's and a Bushnell Elite 4200 6-24.
-Comparing to an older 6-24x50 SIII, the Vortex blew it away in clarity and brightness. It wasnt even close.
-Comparing to a 8-32x56 SIII, the Vortex is just as clear at all powers and ranges, but not quite as bright IMO. I kinda expected the 8-32 SIII to be brighter though due to the bigger bell. I actually just sold the 6-24 SIII not long ago and replaced it with another Viper.
- There was no comparison IMO between the Viper and the Elite 4200. The Viper blew it away in every aspect. Mainly the lack of adjustment in the Elite.
I will say though that the tracking on all the scopes I tested here have been perfect. So basically if you want something brighter you can buy a new SIII, or you can take the same amount of money and buy 2 Vipers!