We like the font and colors, and also like the three-globe interaction as well as the sense of motion. The arm-links between circles might have too sharp of an elbow, and take away somewhat from the fluidity of the design. Sorry we can't rank all your variations; we like #52 the best.
I like #67 the best: it's simple, with color & motion, and I like the idea of exchanging between parties. It fits our business well. I'll be getting feedback from my partner before we make final decisions...