I like InvisiFil thread. It's super thin and very strong. I use it in my bobbin. I like Connecting Threads color sets. I bought the large cone size of neutral color of Connecting Threads and I piece with that for the top thread. I had a sampler of Aurifil and it's nice but now that Aurifil has big names in quilting endorsing it, it has gone up in price. Got to pay those spokespeople somehow.