First question: How comfortable are you with doing the quilting yourself?
I don't usually do SID. To me it is a cop out. Shadow quilting would be preferable to me.
I'd create a pattern for the stars: either something loopy to fit into each of the points and repeat with each point ... or possibly even straight lines to accentuate the points. Though I prefer the the movement of more loopy. I'd do smaller meandering on the areas on the star blocks that are not part of the star.
On the rail fence type of block you could either repeat whatever you did on the stars.
The sashing I'd do something that would complement the star and rail fence blocks. Your choice: vines, crosshatch, or small stars repeated.
I like the idea of drawing different designs to see what 'trips your trigger.' That way you can choose what you like best.
ali