I like #55, simple, minimalistic and straight to the point however when it comes to uniqueness, and edgy, I will go for #62, it has this riddle type icon which is very unique that makes the viewer take a second look and figure out what the shape is and then gets amused when they figure it out.
Would you like the color scheme of #65 and #62 applied to #55? I'll make them for you so that you can compare to other entries. Cheers!
Regards,
PG