Hi Carol, From first glance I fell in love with your design and your color choices. Blue is one of my favorite colors, so of course, I am going to suggest you work with the colors and their varying shades on the design you posted.
When I invision your quilt completed, I would not use prints unless they were very tiny and subtle. Maybe throw in some batiks but prints would, like you said, make it too busy.
What about making a scaled down sample of the center (maybe using four blocks) and then add your white border and your small strips for your outside border to see if you like it with prints, solids or a mixture of batiks. You could use those for place mats to keep or give away.
Beautiful color variations and beautiful design. :thumbup: