I have one scope with the heavy duplex and don't really care for the reticle. A #4 or post and duplex is a better choice for a low light reticle. A 2.5x8 VX3 also wouldn't be my choice for a low light scope, I've got a couple and find them to be lacking in low light. I don't know why, but the 1.75x6 and 3.5x10's seem to be brighter.
