Have owned a Nightforce 3.5-15 NXS for a few years now. Have shot it next to everything, have looked through everything next to the Nightforce, have dropped the rig a few times, have shot at dawn/dusk, have gone all the way up on elevation and windage and back to zero. Leupold doesn't make a scope with better res and more light-transmission. Before buying, I looked at IOR, Nikon, Zeiss, Swar, S&B, Leupold, and Kahles - and I absolutely would buy the same scope again (or, if I had $800 more, the S&B.)
look around online, you can find them for less than list, and with a discount, they run about as much as the Leupold you're probably considering.
People stick with preferences, but I've never met a NightForce (NXS) owner that had anything bad to say of them. I own several Leupolds and Zeiss and, for what it does, I wouldn't trade anything on the market today for the NightForce (except maybe the zS&B PM2, at about 2x the price.)
My advice: do lots of homework and don't buy anything till you've looked through it and everything else in the class.
But that's just me.