lovely!
This quilt
http://www.quiltingboard.com/picture...d-t243130.html
uses borders to perfection
you might do scalloped edging, easier than it sounds. The quilt remains square, but when you sew on the normal binding you add 5"-ish strip of fabric. Then applique down that strip in scallops.
A scalloped binding would also work, but it is a lot more work
