Generally I like your initial concepts.
#4 - Like simplicity of the abstract element though I would want it to have meaning. Like make the white crescent a slyized "M" or a symbol that expresses (energy, power, drive, passion, moxie, dynamism)
#2 - This symbol makes me think aerobics or exercise so that would not fit us.
# 3 & 4 - I Like the abstract elements style and balance. Any way to get the "MOJO" to intersect that mark maybe by making the eye one of the O's in Mojo?
Thanks