Rav Avigdor Miller on The Lubavitcher Was Moshiach
It's very insightful and explains certain issues in a way I don't think most of us have heard before.
It's definitely worth reading through 2 or 3 times.
(Note: I'm not a Lubavitcher and neither was Rav Avigdor Miller. But we both appreciate Chabad and this post explains a lot, and not just about Chabad.)