Best Sports Rivalries

What is the best rivalry in sports? I was thinking about writing a brief description of the contestants below, but I got preoccupied with a few other things. Sorry. If you really want to know more about any of these rivalries, go to Wikipedia or search Google. Anyway, here are my finalists in no particular order:

India vs. Pakistan – Cricket

The Ohio State University vs. University of Michigan – College Football

Brazil vs. Argentina – Soccer

Toronto Maple Leafs vs. Montreal Canadians - Hockey

New York Yankees vs. Boston Red Sox – Baseball

Duke University vs. University of North Carolina – College Basketball

Real Madrid vs. FC Barcelona – Soccer

Green Bay Packers vs. Chicago Bears – Football

Celtic F.C. vs. Rangers F.C. – Soccer

Harry Potter vs. Lord Voldemort (can you tell I have Harry Potter on my mind?)

Cheers vs. Gary’s Old Towne Tavern

Springfield Isotopes vs. Shelbyville Shelbyvillians

So which one is the best? Are there any other rivalries that are better than all of these? Oh, for folks who think Army-Navy football should be here, the 1996 game was the only one since 1963 in which both Army and Navy entered with winning records.