I'm just plinking around 500 yards and in. Mostly around 300 yards. With a ruger American hunter in 6.5 creedmoor. Looking for an opinion on the glass.For the glass I want ffp and zero stop. looking at vortex viper pst gen 1 6-24x50 found on sale at euro optics for $499.99 and Nikon fx 1000 same specs basically it to is from euro optics for $499.99 and the last option is athlon argos btr gen 2 found it for $399. Any opinions on witch to get or any other options in the $550 price range that is ffp and has zero stop. Any help would be much appreciated. Thank you