Originally Posted by MTS
Print out color copies of that picture.
I would print out smaller versions - like 4 to a page, cut them out and play with with them. That way you can see what secondary patterns might emerge.
I like this idea. You could also try the blocks with sashing to see which you like best.
BTW, it will be a gorgeous quilt no matter what you decide. Fabulous job on the piecing and color selection.