I personally love Superior Threads - I usually use either So Fine or Omni threads with So Fine or Bottom Line in the bobbin. If I want the thread to be seen, I use the Glide thread that was mentioned previously (both top and bobbin thread); it has a really nice sheen to it. Superior has just come out with a thread called Magnifico that is supposed to be in direct competition with Glide thread - I haven't used it yet, so I can't give a opinion of one over the other.