Don't cut that gorgeous fabric! Add some borders to make it the size you want. 8-) It is beautiful as is. I would even tie it as opposed to quilting it. You could add an Attic Windows to it, leaving off the window sashing from of the top and left hand side. Use several strips of very dark and different colored fabrics on the right. Use the very lightest of those previous colors for the bottom. Make use of the back side of the darker fabrics for the bottom strips.
Frame the whole thing in one solid color (black is screaming to me right now). 8-)