This may not be any help at all, but I did a "Japanese Lantern". A variation of courthouse steps. Put off quilting for ever because I couldn't come up with an idea of how to quilt. I finally saw a log cabin that was quilted in center of the log rather than an outline stitch. I fell in love with it and did the whole quilt that way. It is much easier to hand quilt in the middle and you don't have all the thickness of the seam to deal with. This would also highlight the spiral of the block you are quilting.
I'm sure whatever you decide will be beautiful. The quilt and quilting speak for themselves. Great job.