Thread marked "Quilting", like Coats n Clark, have a coating on them to help keep them from tangling during hand stitching. This coating can gum up your machine. I use generl purpose sewing thread...and sometimes Serger cones. The thread is really strong, even though it's only 2ply in most cases.
I have used bottom line by Superior threads, and it's nice also. Easier to get a true 1/4" seam that way.