I use Connecting Threads Pro thread for piecing, bobbins, and machine quilting. It's 70wt poly and is strong enough for fast stitching. I like Glide thread and Glide Delight bobbins for most of my machine quilting. I have all brands of thread. I won two big Aurifil thread collections last year on blog giveaways. The colors are so pretty. It's very good thread.