I would definitely add a border, and when you do, I would stick with one that is simple. Those blocks are beautiful and you want to add some "calm" around it, and draw the eye to the blocks (inward) instead of out toward the border. Burgandy is a nice choice, but I also like the idea of a rich light brown, one that has lots of depth to just soften it. I have a picture in my head, but unfortunately, haven't figured out how to scan those and post 'em!! Nice job - it's a really pretty quilt.