I find the a larger sight picture and better clarity of my ATAC-R’s over the NSX. Unless cost were a major barrier, I would opt for the ATAC-R. The added weight/size over the NSX is un-noticeable. When weight and size become an important criteria, the March 2.5x25x52 SFP/MTR-3 reticle is a superb scope, tracking as well as both NF’s, and better in low light and high glare conditions. It will maintain definition at a higher magnification(3X+) in low light conditions as well. I have not experienced any issues above 20X with mine. IMO, it’s well worth the price.