I really like that fabric, though I agree with some of the others ... it's busy, and pulls your eye away from the work you have done on the quilt.
Also, we really can't see the quilt. Any chance for a picture of it, more full on ... perhaps stand on a chair/ladder and shoot down? Or pin to your curtains? or?
That being said, some thoughts would be ...
After the black that you already have on there, a 1/4" flange in a colour you want to have pop from the quilt. Then more of the black, about 2 or 3 times wider than the first black.