These are very interesting! I like 134 and 135. What you did with the leaf and the letter C is nice, but I'm not sure it's exactly what we're looking for.
Do you think you could do something like 136 but with a tree form of some kind (maybe a bare tree) with the leaf (or some sort of leaf theme) wrapped around it? We're trying to stay away from globes. We were initially trying to stay away from blue, but we have liked some of the blue entries others have sent in. However, we tend to like a darker/deeper blue or blue just as an accent color.