I am totally getting the Wii version of the game. I just really want to experience Zelda differently this time around. I have played 2 traditional 3D Zelda's and they are great...but 3D Zelda isn't like 2D Zelda, or 2D Mario in that the game is so perfect that you can constantly replay the over and over.
Besides, the Wii version of the game may actually run with Gamecube/Classic control setup AND Wii setup? Why not? Since the code will already be designed and balanced you could easily just choose in a menu setup which you want to use...or it could detect if the classic controller is plugged into the Wiimote or if a Gamecube controller is plugged in and ask you on bootup of the game.
In any event, better graphics, sound, new control system make the Wii Zelda experience the definative purchase.
It would also be wise to note that E3 will not represent the final control mechanics of the game on Wii, and the game may in fact become much tighter in control before launch. The same is true for Metroid Prime 3: Corruption and Red Steel. People assume the control is locked into place how it was at E3...and there are several more months for everything to get tweaked and perfected.