Feedback please.

Thanks to all of you who have submitted designs. One thing that I would like to emphasize is that I love all of your creative ideas. I am thrilled to have all of you submit your ideas for my logo. So far it has been an exciting process.
My suggestion for future designs or revisions is that I would really like the atom body of the ukulele to resemble an atom. If I were to show this to someone for the first time, I want them to say, "Hey, that's an atom." I think some of the designs submitted already portray that, but there have been a few that allude to an atom but if I were to ask people what that is, they probably wouldn't guess right.
Also, I am really enjoying the detail of the ukulele neck and the brown color of the neck. Most ukulele players love ukuleles made out of koa wood. Finally, I am interested in seeing designs with some color. I am not set in stone on what color I will finally decide on so it is wide open on that. I just need some help seeing what you had in mind and how it would work or doesn't work with the overall logo.