Lovely quilt!
I would make it easy on yourself. Do a two inch plus seams inner border of the burgundy, then the outer larger border. What are you planning for the outer border? You may want to have the binding the same as the outer border.
I would audition different fabrics for each of the borders. Lay down the outer border, then the inner border, then the top. Ask us, ask other quilters, as at your LQS for opinions, then make up your mind.
Good luck with your quilt. Please keep us updated with the progress of your project with pictures. We love pictures.
Thank you for sharing.
Pam M