When it comes to batting, the type will depend on the finished look that I want to achieve. If I want a smoother, more modern look....I use poly and Hobbs PolyDown is my choice as it's easy to use, not overly lofty and reasonably priced. If I am looking for an old fashioned crinkly look, I use an 80/20 blend that I buy at WalMart. It is much cheaper than Warm and Natural, but quilts and washes well. I don't overquilt, but usually have quilting lines every 2-3 inches, so the quilting requirements don't factor in to my choice of batting. I have a Janome 6600 and do all of my own quilting, even the king size quilts. I do use basting spray, so compatibility with a spray is a necessity.