I vote for #3 - but, that said, YOU are Queen of the Quilt so you must do what your creativity is leaning toward.
If you think the blocks need something more, coordinated sashing would set off each of them nicely.
That is simply beautiful! You did a very nice job. I think there's a name for that method but can't think of it... somebody on this wonderful board will know it, though. Would like to see a tutorial on it.