This is my first post on this site. I have been watching as the Vortex Viper PST series of scopes have hit the markets and gained popularity. I have read the evaluations performed as well as the many opinions about their quality. I am caught between purchasing a Mark 4 or one of these Viper PST's. I love the options and the price of the PST, but I cant help but notice Leupold's reputation and the fact that I have used them for police work before. This scope will go on my personal rifle and I guess my biggest requirement considering the virtues of both options is unflinching reliabilty. My question is: would anyone rely on one of the PST's with their life. I personally trust a Leupold, but can we put the PST in the same teir as a Leupold.