Did you draw your fence? I love your interpretation (Dresden>sunflowers)
Are you trying to stay away from sunflower printed fabric? I'm thinking that for borders.
i love the borders @ quilter's cache
http://www.quilterscache.com/B/Borders.html
some kind of winding border in your yellows with neutral background.
or maybe an inner border of yellow & outer twisty border fence brown against blue sky. Maybe the pyramid one.