I've been slowing building up my collection of thread.
Superior Threads' thread of the month club for So Fine #50. This is my all-time favorite thread for machine quilting. It blends nicely and a joy to work with. Don't think this is just for long arm quilters, because it isn't. It is a great thread for piecing and quilting on your home sewing machine, too. I don't recommend things I don't use (and I'm not compensated to say any of this).
Room for more thread!