Have you thought about setting them "on point" and separating them with an Attic Windows-type lattice? By setting them on point and fiddling around with the angles at which they're flying, I think they'll look more life-life and your quilt will have more energy.
I'm now going to try to post a photo or two of a quilt I made using the type of lattice I recommend: UH OH. THOUGHT I KNEW HOW TO DO IT. WRONG! WILL NOW LOOK FOR INSTRUCTIONS AND WILL TRY AGAIN.