I use Aurifil for both piecing and quilting. I buy large spools of the standard colors (tan, black, cream, red, blue, green) at my LQS. My DH bought me the entire collection of Aurifil (216 spools containing 220 yards of thread; 182 solid and 34 variegated) from The Pacific Rim Quilt Company for my birthday a couple of years ago and another one last year for Christmas (just in case I run out soon!). Now I never have an issue of finding a particular color to quilt with!