Also, thanks to the Daemonic Table, you can never tell when an enemy psyker gets his mind fried and you get a free Herald dropping out of the ether. Better be prepared for the occasion, as it would surely be considered rude not to take advantage of free models...
I wasn't really happy with my initial efforts though:
In the end, I decided it was the head, tore it off again and came up with a new version I prefer by far:
Obviously, I still need to do all the greenstuffing, but I think the basic concept is very sound.
Oh, and the model isn't small, it's just standing on a 40mm base. I was never really happy with the official concept of Heralds just being slightly beefed-up regular troopers, I always thought they should stand out, so they should be discernibly larger and certainly get a base upgrade.
I actually can't remember where I got the antlers from, but I really like them as they feel so Nurgly...
+++
So, when I said some Heralds, I wasn't exaggerating, I was working on two of the dudes at the same time. However, I was even less content with where the second Herald was going, so I disassembled it completely and now am left with just the bare bones of a model:
Still a long way to go, obviously...
