This is my fave album and all songs are great (except "Can I Play..." maybe...), but I picked "Infinite Dreams".
Evil That Men Do, easily, followed by Moonchild, one of Maiden's most underrated. The rest is not quite to Maiden's standards, except for some of Infinite Dreams..
Moonchild. Infinite Dreams bores me, and it has a shite ending. I would have voted The Evil that Men Do, but the 'living on a razor's edge' lyric gets a bit tedious...