That is probably one of the most gorgeous tops I've seen this year. I don't send out my quilts. My language deteriorates as I wrestle the quilt through my little machine, but I get it done eventually. I'm probably wrong, but I'd think about echo quilting and then grid the negative space to make little diamonds. I really like the result of grid quilting and the resulting diamond look, use a high loft batting to make it really stand out. Takes a lot of time and watching to be sure the lines are exactly straight, but I like the result.