Sandpat that is an amazing quilt! I love what you're doing for the borders. It is exactly what that quilt calls for.
I think Patrice is on to something here. My very first thought when I saw your question and looked at the quilt was that it would be so spectacular if you could somehow bring the flavor of the compass into the corners, even if only the center of them, or a smaller version. (but then I noticed how large they are in contrast to the border and thought "no" that wouldn't do. :lol: ) But using even a part of the block would be gorgeous.
I also agree with Chele. That really is a show-stopper. :)