I like on that is made in Jacksonville, Florida, called "Trinidad". They make it from mild, all the way up to XXX Hot. I prefer the XX Hot. But even the XXX Hot do not compare with the sauces made from Bhut Jolokias, or Moruga Scorpion peppers. The one I like is made with habaneros, and still has lots of nice citrus flavor. They sell it at California Tortilla, in the X Hot version, which is not as hot as I enjoy.
BTW, I do grow the Carolina Reaper pepper..... now recognized as the world's hottest pepper.