I have used all brands. I like a thin thread to use for piecing and even thinner in the bobbin. I use size 60 or 70 and even found Aurifil in 80wt. If I use a size 50 3 ply for the top thread I use the thinnest thread I have for the bobbin. I would buy any good brand that was on sale and be sure to match the needle size to the thread size.