Angelcigs is very legit. I have ordered a lot of stuff from them. Mostly mech stuff. But it's good stuff. I can't speak for the sigelei because I am not very familiar with them. but if they say it is authentic, then it probably is.
Edit: I forgot to add that the support is pretty good. It's all via email, but they really stand behind their products.
Edit: I forgot to add that the support is pretty good. It's all via email, but they really stand behind their products.