Your JD looks like a dude! Females have more pearling on their lower gill plate. Yours clearly does not have much at all. Great looking fish though! But i'm pretty sure you have a young male dempsey.
Ok I contacted the guy and he said that the JD was the female in his pair. He said she was the one that lays eggs LOL. Well i'll just keep him/her i guess and we'll find out in the future. If Boa is indeed a male, then atleast i'll have a beautiful male JD for the future! That picture doesn't do Boa justice. I'll take a nicer picture of her when i can