I like the design in both of your entries (#6 and #7), however I'm not thrilled with the dancers in the spotlight - almost makes it too busy. Can you submit a design similiar without the dancers in it?
I do like it without the dancer but it seems almost 'intrusive' of the 'O' on the ground. Maybe some way to use the spotlight without making the '0' so highlighted....
I definitely like it on black better which makes me think that it might be hard to do on white shirts? Any other ideas to make it more universally appealing between black and white?