The most heated rivalry in the NHL this season has been between the Philadelphia Flyers and the Pittsburgh Penguins. These teams are inter-state rivals who both have over 100 points and are set to play each other in the first round of the playoffs, in what may be the best series of the playoffs.
The Penguins hold a 1 point lead over the Flyers for fourth in the conference, and for home ice advantage in the imminent first round match-up. They both have 3 games remaining, one of which being against each other. The Penguins, though holding a lead in the standing, have fallen four out of the five times these teams have met thus far this year. However, Crosby has only been in the line-up for the Penguins in 2 of the 5 games (though the Penguins lost both with him anyways).
The games between the Flyers and Penguins have been high scoring affairs all season long. In fact, the lowest scoring game they've had is a 3-2 overtime game, in which the Flyers won with a last second goal by Scott Hartnell.
Aside from lots of goals, there has been plenty of hitting and aggression from both sides. The perfect example of this aggression being March 3rd's game which saw both sides giving crushing hits, starting fights (even line brawls) and having their coaches go at one another.
What hockey fans have to look forward to is not a defensive duel, nor a goalie battle for the ages. This series will have more goal lamps lit than you'll find lights on a Christmas tree. With forwards the likes of Crosby, Giroux, Malkin, Jagr, Neal, Briere, and so on, the series will hold host to two of the best offensive teams the NHL has seen in years.