I like a double border...narrow inner, wider outer borders, then a binding same or similar color to the inner border. That seems to be my favorite way to go anyway. :)
I find it best to "sample" a few ideas. Spread out the quilt and fold up or tuck under the edge what you want to try out for the borders. Sometimes you find something that looks better than your original plan. The only thing I'd avoid is using the busier prints. I'd use a marble or tonal so you don't lose the focus on the center of the quilt. Do you have any fabric left? Show us some options! :)
Edit: forgot to say I love your quilt!