I am going to do a proper post once all 50 are announced but with yesterday’s post, the entire Paul Smith run has made the list.
http://goodcomics.comicbookresources.com/2013/07/21/50-greatest-x-men-stories-master-list/
Issues 165 to 175, not counting 171
40 Professor Xavier is a Jerk (168)
37 From the Ashes (174 & 175)
24 Dancin’ in the Dark (169 & 170)
16 The Brood Saga (165 – 167)
8 To Have and Have Not (172 & 173)
Throw in the Asgardian Wars two parter (13) and that’s his entire run proper. He did the, what I would call, the prelude to the two part Art Adams story, but you need to read the Smith issues, as that is where Loki first experiences the X-Men, and promises to leave that cast of X-Men alone, hence why Loki goes after the New Mutants.