Wonderful blocks. They are so bright and cheerful. You have so many opportunities for your quilting. I would get out the sketchbook and try several things. Sashing, whether the prints or solids, confines the eye movement to squares and is very pretty. However, not having sashing opens up areas for special quilting that could become the focal point and would push the pieced stars into a secondary position. I think it's especially true since the stars are not solid. This is a really interesting quilt. Good luck in choosing the 'right' option for you.