I have a question for you guys that have used both. I am looking at one of these for a 14.5" AR. It will be my go to rifle. I have very bad eyes so I am wondering how much that extra top end will do for me. I have looked through several Kahles 1-6 and am impressed but have not had the chance to look at the NF atacr. I have looked through the nx8 but did not like it . Thanks for the input.