Hey, RG--I think your quilt is gorgeous!!! And no one would ever know you had difficulties with it if you did not tell them. :)
As to the border.....I would not put one around it unless you want it to be bigger. I think it is gorgeous just the way it is-I would bind it in black and call it done!
If you do decide to put another border, use the black and it will make your sawtooth border "float". Would be a neat effect.