I have had two HD scopes, both on 36mm objectives. They were great in low light...but I just could not fully endorse them. The HD was just too much of a good thing.

I then used a Priemer 4A on a 2-7 Leu. The thin portion of the crosshair was mismatched to the thick post.

I then tried the Post and Duplex. The best of both worlds. I perfer the Post and Duplex over the HD or the 4/4A.