This is a lovely quilt and you've chosen a beautiful quilting design. I am also a hand-quilter. If this quilt is to be hung, I think your border is sufficient. If it is going to be used as a cover the edges will get a lot of wear and tear. I usually quilt diagonal lines, about 1 in. apart, not quilting into the design. Lots of extra work,but it does strengthen the border. Whatever you decide to, your quilt be lovely finished. Happy quilting!