Thinking about picking up a Razor HD Gen II 3-18x50 for my Seekins SP-10. Doesn’t seem to be a lot of posts about the 3-18x50. Anyone running one of these on an AR platform? How does it stack compared to the 4.5-27x56? Should I spend the extra coin and get the 4.5-27x56? Most of my range work is 100-600yds.