Nightforce NXS Scopes are AWESOME!!!!!!! The 5.5x22x56mm has the most elevation MOA avaliable and it will allow you to reach out way past 1500 yards.
IMO, Nightforce NXS scopes are the best scope available, other than S&B. Nightforce NXS scopes are expensive, but they are worth every penny!!!! The NXS 5.5x22x56 will cost you about $1550.00. the NXS 8x32x56mm will cost $1650.00, and the NXS 12x42x56mm will cost $1730.00. You might be able to find them for a better price. I am thinking JB and Learch can get you a much better deal.
The S&B's are extreamly nice, however, they will run close to $3000.00.
I have owned 4 Nightforce NXS Scopes, and I will never use another scope unless I can afford a S&B.
IMO, this how I rate the following scopes in order. I left out the S&B scopes, becuase they are soooo expensive. Here are my top 5 with #1 being the best;
1. Nighforce NXS scopes
2. US Optics Scopes
3. Leupold Scopes
4. Nikon Scopes
Don't get me wrong, I like Leupolds too. However, once I started using Nightforce NXS scopes, there was NO comparison and NO going back as long as I could afford them. If I couldn't afford the NXS, then my next choice would be a Leupold.
IMO, Nightforce scopes, compared to Leupolds, have MUCH better Optics, better overall operation of scope (Moving parts, ect), Better Click Value, Better Reticle choices, much stonger, better looking, better return to zero, ect.
Remember, the above mentioned comments are my opinions, So please, if your a Leupold guy, don't get mad. I know there are others that will say Leupolds are just as good. However, I think you will find that many on this site will agree, Nightforce scopes are much better than Leupolds and the others mentioned scopes, except for the S&B line of Long range scopes.
Get a Nightforce NXS, you will thank me, I promise you!!!