You've done a great job on your quilt. Figuring out what quilting pattern to use is always an issue with me as well. But, that's such a nice star. You need to focus it and let the rest of the quilt stay in the background. To do that, I'd echo quilt inside the star with some metallic thread. Maybe 3/8" echo will really show it off. Then, I'd just meander the background and be done with it.
You're getting some wonderful suggestions. Can't wait to hear what you choose.