Your quilt is beautiful. I use Mettler,Gutterman and Maderia thread. I use the same thread in my bobbin that I sew with. My sewing machine dealer, says never buy Coats and Clark as it is cheap thread. That is their opinion.I do use Coats and Clark sewing machine quilting thread. I think it is a matter of what your machine does with each kind. If the thread keeps breaking then change it to something a little heavier. My opinion, Matter of preference.