I'm with rmstress. If you do piano keys you're using the black and white anyway........AND......you're adding another design element. Doesn't that just pull your eyes another direction? the black and white has already been introduced and in a checkerboard will just be a repeat of a design element that is already there. perhaps do a small checkerboard border, then finish with a solid black "frame". I also liked Ditter's suggestion of B&W Tone on tone. You have made a Stunning quilt in my opinion.. we all know I'm a bit of a wildchild when it comes to color and design sooooo. If you finish and don't like it I'll send you my address!! BTW.. what's the pattern and where do I find it? It's truly a knockout!