The quilt is very nice. It will lend itself to either bordering it or not bordering it. Decide what size you want it. If it needs to be larger, go ahead and put a border on. I would start with a very thin border of one of the colors (depending on where it will go) and then put a larger border in the darkest color that you want. Regarding the quilting design, I would do a loop de loop with just a meandering stitch. That will tie all the colors together. Good luck and be sure to show us when it is finished. Thanks for sharing.