For a LR Scope the most important things to me are, in order:
1) Reliability to both hold zero, make reliable adjustments, and not break easily.
2) Wind holdoff's via the reticle, not a dial.
3) Weight
4) Glass
Your priorities may vary if you don't plan to carry the gun up and down Idaho's mountains like me. Clear glass is important target shooting and getting small groups, but not hunting.
This said, I am very happy with the Vortex Viper HS LR series. They are a very economical option as well.
The newer Nightforce SHV series seems great as well, though I don't own one. All Nightforce models are heavier, but the trade off is stronger and more reliable construction.
Leupold is just not build for in the field long range(over 500yds) applications. They are light and clear. Swaro, has the same attributes as Leupold but just doesn't have the true LR applications either for windage for sure. They are very clear!.