I have a viper pst that I absolutely love but if I was going to purchase a new scope today I would order a vortex-razor-hd from eurooptic.com since they are running a close out deal for $1349. You can't go wrong with any of your choices but more for the money is always good.
Is the rifle located with you in PA? I will let you know after I talk to my father since while we were back home in MT somebody broke into our truck and stole his rifle. If he wants that scope too is it the sfp model pst? Thanks