Hmm, I would not be so happy about facing Atlanta in the playoffs. Remember how Carolina beat the crap out of us in the regular season last year and how we scared them until Koivu went down...
That and that Sout-East bad karma we have... I would certainly not "hope" to face Atlanta based on our regular season record against them.
I think the Habs match up well against Atlanta, though. The Atlanta D is really very bad, and the goaltending can be shaky. Further, Hossa and Kovalchuk don't seem as effective against the Habs as they do other teams.
Anyhow, I can't think of any team I'd really hate to see Montreal face in the playoffs. NJ is probably the only team I think would be a considerable favourite over Montreal.
That's not to say I'd expect Montreal to beat anyone other than NJ so much as I don't believe Buffalo, Ottawa, Atlanta, NYR, or any of the other team is that much better of a playoff club than the Habs. Every team has their flaws, and Montreal matches up pretty well against all of 'em.