Oh, my goodness, that is GORGEOUS!!!!!! :shock: :D :!: :!:
I have done many D9P's, but yours really takes the cake! Your fabric choices are incredible, and your work is very precise. GREAT JOB!!!
As for the quilting, I would definitely KEEP IT SIMPLE. Depending on the type of batting (thus, how close far apart your seams can be), I would probably go with the diaganol cross-hatching: Left to right through the black squares, then right to left :D