Finally gathered up some cash to put a scope on my heavy barrel AR prarie dog rig. Looking to stay around $500, which brings me to the VX II 6-18X40 with the target knobs, or the Nikon Monarch 5-20X44. I plan to dial targets in, and the 1/4 clicks on the Leupold sound better to me than the 1/8 on the Nikon. Both are limited in standard reticle selection, but I know I can send the Leupold in to be changed. Any thoughts on the better choice? Any others that I ought to look at? What reticle would you all suggest for varmint hunting?