I think it would look good either way. Personally, I prefer borders on mine. I'd do a narrow inner border and wider larger border. I would probably not use the color of the "star points" in the border though because it might take away from the center. Maybe the dark for inner border/binding and light for outer border. I usually lay them out and stare at them for awhile to see what jumps out at me. Border and binding colors are things I generally change my mind about at the end, so I rarely cut them out ahead of time.