The margins are razor thin right now. Looking by points percentage (to even out GP),
Tampa is Atlantic 3 at .561
Ottawa is WC1 at .560
Columbus is WC2 at .550
Boston is first out at .538
and that tightness goes all the way to Philly, 14th in the conference, sitting at .510% (3 points back with CBJ holding one game in hand).
The only teams in the East that have separated themselves, negatively, are Buffalo and Pittsburgh. And even those two teams are one medium-sized points streak from being right back in the mix.
Tampa and NYR seem likely to me. In fact, the Devils (currently Metro 3 at .596) should be careful of NYR as they are just 4-3-3 in their last 10.
For the final spot, I have a hard time differentiating between everyone else. It's that close. My gut says CBJ ekes it out. They feel like a team of destiny this year.