If I had to make a top ten list of my favorite DS9 episodes, that would be one hard task. I will say that I know for sure that The Visitor would be #1, so I agree wholeheartedly with that one. There are a few on the DoG list that I wouldn't have chosen, but that's neither here nor there.
I do think not having In The Pale Moonlight might have been some sort of oversight, but also like someone above mentioned, it's subjective.
That's the great thing about DS9. You could have 3 people make 3 top 10 lists with only a few episodes in common, and you can usually understand why they chose what they chose, even if those aren't your personal favorites. There are quite a few outstanding episodes to choose from.