My machines are not fussy about thread. I like Aurifil best, but I mostly use Mettler silk wrapped because that's what my LQS sells. I also really like Masterpiece thread. I do use some Coats & Clark because I have a lot of old spools. All of my machines will use any of it. I do find most lint from Coats &Clark though. For my Bernina embroidery machine, I use Isacord. I bought a lot of Madiera Rayon when I first bought my machine, but it breaks a lot. I switched to Isacord. It is strong, but pretty. Comes in lots of colors too.