So I'm looking to invest in a spotter come tax season. I have narrowed my choices down to either a Vortex Razor HD or a Nikon Field Scope III. When I look at these side-by-side these two look pretty comparable. The Razor gives me a ranging reticle but I have to purchase a 50mm lens for my D3100 to digiscope with it. The Nikon doesn't offer a ranging reticle but I can digiscope w/o having to purchase a new camera lens. Anyone else have experience or thoughts about these?