I use Warm and Natural and Warm and White for all my quilts. I love it. I buy it by the bolt when Jo Ann's has it on sale. I have split a bolt with a friend before, but if you make lots of quilts, you will easily use the whole bolt. I save all my pieces that I cut off and stitch them together to make batting for table runners and wall hangings. No waste. There is a stitch on my Bernina that is perfect for seaming it together.
I buy the queen size bolt and it is 20 yards long. If I make a smaller quilt, I save the scraps and use them for other projects.