And let's put it in this perspective, in The Dark Knight's defense.
It seems to me (bear with me, this will make sense) that older films like Raiders of the Lost Arc, Star Wars, The Terminator etc. are generally considered better films than their "modern takes". Modern film counterparts like Kingdom of the Crystal Skull, Episode whatever and Terminator Salvation.
The first Batman is a classic, a world wide phenomenon that has been well received. Much like the other films I listed from that 80s era.
The difference though is that there isn't a clear cut winner between the first interpretation and the modern one. Hence this Batman 1989 vs. The Dark Knight debate.
To me, that's pretty cool. If someone asks me "hey, which do you prefer, Salvation or the original Terminator", I'm not going to think twice, The Terminator.
But ask me the same thing about both Batman films and I might just make a long ass rant why they're both so damn good.