That is a great picture! I can't give advice on this, but I have a feeling that the quilt will be stunning, no matter what you do.
I would love the picture you posted as a center panel, but I don't know if you can print on to cloth large enough to make it a center panel. Might have to print it in sections for that, then sash it to make it look as if you're looking out your window.
Sorry about that - I only saw the first picture post. It appears you do have a panel!