I like #2. It has a bit of impact and looks fairly sharp - it's difficult to gauge when you're on a low resolution link like this and can't pixel peep.
#4 has the point of focus on the wings and not on the head/eyes. The eyes are all in lepidoptera as well as more or less everything - it's what links us with the other beings - or so I'm told. Well - it works for me
If you aim for anything in photography - look and aim for the eyes.
Acher