that is an adorable quilt! I love it great job. I think either way you will look nice. So often I tend to go with variegated threads for quilting. Its not always easy to find a match though. Pictures make it hard to match colors, but King Tut has some very pretty variegated threads. Chalice, Sphinx, and Sarah Shadows are very nice - but not sure how close those colors actually are to your fabric I am sure there are other brands of variegated threads that have nice colors as well