#17 I like the idea of a graphic in the O, not sure I like this one. In the past, I have used a sun with 8 points - that could be an idea. One thing I'm considering is having that graphic be able to stand alone on some of my materials. You have a good start with this. Also, the font should match that of my Inbox Detox label.
#2 I like this one too. Not as jazzy, but it is growing on me. Needs the right font, too
#3 I dont like this one as much as the other two.