Glass quality should be about number three on a list for which scope to buy. You'll never miss a shot with a NF because glass quality isn't good enough. The Nightforce scopes are durable, track, have good reticles and have a good feature set. I've owned two great NF scopes.
In the price range, I'd also suggest looking at a Leupold Mark 6 3-18x.
In the price range, I'd also suggest looking at a Leupold Mark 6 3-18x.