Okay, Cissy--that is just gorgeous!! I love the fabrics-what line are they?? I agree with Mary-I love the randomness of your layout, too. Simpy smashing, my dear :D
How to quilt it. Hmmm....this is my weakness. I always freeze up at this point. I downloaded your picture and noticed that you used a blanket stitch to applique your dresden plates. So, to quilt it, I would just quilt in the ditch between each wedge. Also quilt around the center circle--not in the ditch, but just a tiny bit away from it (so it does not catch your blanket stitch. In the center I think Patsy's mom's suggestion of a spiral is a good one. I would quilt very close to--but not in the ditch-around the whole plate too. Then I would stipple the background. Like I said-this is my weakness. I am sure that others will have much better suggestions!!!