I really like the idea of the yin/yang concept for balance, but I do not think I'm going to go with it. The figure seems a little too forward facing, and I would prefer more of a profile image; less celebratory and more striving forward as if to reach a goal.
Check out Fotolio.com image #13113401 for an idea. The right arm could be lower though.
http://us.fotolia.com/search?k=13113401&filters%5Bcontent_type%3Aall%5D=1&submit.x=0&submit.y=0 So, putting the ring around the circle does pull out the '40', but it also makes the artwork too small. But I prefer the 2-toned logo (#29) to the solid color (#38), so I don't have any ideas on how to resolve that. I hope you do. Maybe a slightly darker shade of blue for the '4' and a thin ring of that shade around the circle? Thanks for your quick responses and attention to detail!