vey nice. I agree with the idea of a small solid border to stop your eye and then a larger border. I like it as is, but it would also be nice with a sashing. You have really given yourself a lot of options! This is a quilt that I would consider who it is for and go with their favorite color. If you don't have anyone in mind, then go with your favorite. A yellow or red border is going to make a statement where as a blue or green is just going to frame it. Definitely audition fabrics for a couple days and see what one keeps drawing you back.