I just got into long range shooting about a month ago and bought a sfp Viper PST 4-16x50. For the money, it's a great scope. The glass is very clear out to 1200yds and it tracks perfectly. This morning we were dialing as fast as we could between targets at 350, 550 and 700 and it was dead on every time.
I'm still very new to this game, but the only thing I'd change on it would be the turrets, I'd like to get 10mils per turn instead of 5. I've also compared it side by side to a Premier and the Premier was definitely better, but I don't think it was 2K better.