Wow! This is such a beautiful quilt! You did a fantastic job.

For border advice, I'd suggest a narrow inner border of a very light fabric, then a 3" or so outer border of one of the prints you used or something similar. Whatever color you choose will bring out that color in the quilt, so if you would like to highlight the pinks, choose pink, etc. And follow Rebecca's advice! I've pulled out too many wavy borders (even two after the center of the quilt was already quilted!) and I never want to do that again. I know you don't either!

Congrats on a very successful quilt!