Update: I did end up adding a top binding to my Tradewinds Quilt, and here it is:
Two layers of binding - photo from my Instagram
I feel like it really changes the look of the quilt, so I decided to show you guys the update. The purple binding really bring out the subtle purple in the main fabric, and it ties together the colors of the quilt top nicely as well. And I really love, love, LOVE the look of the backing fabric peeking out under the binding edge.