Dear Arm,
Thanks for the logo entries. They are both striking and well thought out. Between them, I prefer:
1. the antelope with the curving horns - they give a greater sense of movement.
2 the version of the sun without the rays - they look a bit too busy compared to the sleekness of the rest of the logo
3. the more leaf-shaped green earth that the sun rises over in entry #16
4. the more organic lettering used for Gaia in entry #16
I am not so keen on the white sun spot in entry #13.
I hope that is helpful.
Geoff Shuetrim