Currently building my first AR10 on a 18" Aero platform. I've used some LPVO's in the past, but never owned one. The max distance I'll shoot at on a regular basis is 150yds. I'm thinking I'd be happy with a 1-8X. What are some of your opinions on the $300-$500 range? I've been looking at Vortex and some of the primary arms offerings.