It is really all a matter of personal preference and I have used all of the ones that you mentioned. The heavy duplex and German #4 are usually used by those who hunt during very low light conditions but are, in my opinion, too thick during regular light conditions. I have an Elite 3200 1.5x-4.5x-32mm with the Firefly reticle and the cross hairs are just too thick for my taste. Oddly enough, during low light conditions, the glowing reticles are, or at least appear to be, thinner at night than the reticles are during the day - which leads me to another point - illuminated reticles. I have many scopes with illuminated reticles (most of which are electronic powered) and I love them because the reticles are regular thickness during the day, and illuminate the same regular thickness at night. You may want to take a look at them.
Zachary