I bought the magazine to do the same quilt! I have yet to get it started! Way to go! I love yours.
When I do mine I'm going to do black as the sashing and border as it will remind me of the granny square afghans my Grandmother made for all her family.
My suggestion for quilting??? SID and then feathers, wreaths, or loose meandering. Not sure yet what I'll do on mine. I'll have my long arm by then so .....