For some reason I am iffy on the Circular/Star design because the stars themselves leave large areas of blue that aren't occupied. There's not really a problem with that, but for some reason I feel it to be a problem.
I like the square design that the US has already, where the stars fill in the large majority of the blue.
I'd probably choose option A as it's the most reminiscent of the current flag, but the horizontal asymetricallity of it irks me too.