Your quilt is absolutely beautiful and so nicely done in every way. There are lots of choices for finishes and it comes down to personal opinion. If you choose to go ahead with a border you might consider the print that is used in the blocks and bind with the fabric that is used for the frames in the blocks. I also think others have made great suggestions for you to consider. Please show us your quilt again after you decide. I think you have a great quilting future because you have had a great beginning.