It is important to use a topstitch needle for FMQ because the hole in the needle is much longer than a universal needle. Most FMQ instructions say to use a size 14. It is also important to be sure the needle is in perfect condition-no burrs from stitching over pins, etc. I like to use a variety of threads-but none that are 'cheap' because thread makes a huge difference in your quilting and also the lint problem. I do not use nylon or polyester thread for STID. I really like the Bottom Line from Superior for that purpose. I do like Aurefil, Sulky and Superior for quilting because I like heavy threads in my designs sometimes. I do think you get lots of 'bang for the buck' with good quality thread.