I use Isacord embroidery thread. My machine is a Bernina, and it likes the Isacord. I have much less breakage with it than I do with the Madeira thread. The Isacord isn't as shinny as the Madeira, but it is much stronger and easier to sew with. I buy it at my LQS where I get a discount, but it is still expensive. I use mostly Christmas colors with my embroidery and have collected several colors. My husband thinks I'm crazy, but this year for my birthday I asked for $200 worth of thread for quilting. I buy my thread with birthday and Christmas money.