First, the disclaimer:
I am a crazy person.
That said, I like #67, because it contrasts nicely with the sharp pointy Tesla T in the left corner (at the top of the forum page), and looks a bit like a tail (for the T), making us followers of Tesla...
I WOULD like to see the lettering ("TESLA MOTORS CLUB") vertically squished to the same height as the space above it... but keep the length, of course.
I'd wear the T-shirt.
BUT....... I am a crazy person.
Happy Tuesday!