If this sample is unacceptable, I can't wait to see the real thing!! This is going to be beautiful and no need to change the thread, no contrast needed. The negative space quilting stands on its own! You will need to quilt just as close as you are for your lettering to stand out as it does. I have to agree with others that place mats may not be the best idea because of spills but a nice pillow or two will be splendid. Nice work!!