I am building a 6.5 Grendel ar with a 18 inch barrel for deer hunting. All my shots will be under 200 yards. I will also take the rifle to the range occasionally to shoot, but nothing over 400 yards. I have decided on a 2-7 power scope but need help picking which brand to go with. The choices are; burris fullfield E1, leupold vx freedom, sig sauer whiskey 3, vortex crossfire II, or the Nikon p3. Any input from members who have experience with any of these would be greatly appreciated, or if anyone knows of any other 2-7 power scopes in the $200 range that I'm overlooking.