I own two Nikon Monarchs, 3x9,40mm on two Weatherbys, 300,and 340. I have recently put a Vortex Viper PST, 6x24,FFP and zero stop on my Cooper,MDL22, 6.5x284. The Nikons are excellent hunting optics, track perfectly, and handle WBY recoil just fine. The Vortex is big and heavier, but optically my old eyes see no real difference.
I don't think you'll go wrong either way. I'm quite satisfied with both. I have in the past used Leupold, Weaver, and Zeiss optics and you won't be dissappointed with any of them IMO. They are all warrentied lifetime, transferrable.
If target shooting is your gig, then the Vortex or Leupold, may have more to offer, but for hunting Nikon is as good or better optically, than just about any offering in it's price range.
I have never had a scope fail, of any brand, maybe good luck, or just good optics. The warranty is excellent on all of the montioned scopes, so I don't think you'll go wrong with Nikon, Vortex, Leupold, Zeiss, or Weaver. I have been shooting and reloading for magnum centerfire since 1976
I think Nikon, Weaver, Leupold all use the same glass and Vortex also for that matter. Take your pick. If it's for hunting, then Nikon is great, for targets Leupold or Vortex would be my choice. Good shootin' pal.