Super Smash Brothers Brawl is going to give players a choice on what controller they feel suits the game the best. Purists can opt for the Gamecube controller or the classic controller and if you want a new experience you can try the remote/nunchuck combination. Out of the four options Masahiro Sakurai, the developer of Super Smash Brothers Brawl, prefers the Gamecube controller.
I suppose I would recommend the Nintendo GameCube controller, though. I like the feel of that powerful rumble.
After playing a handful of fighting games on the Wii, I tend to like the Gamecube controller over using motion control too, but not for the rumble. Shaking the nunchuck to do an air dash doesn’t feel accurate in Dragonball Z: Budokai Tenkaichi 2 and shaking the remote to punch in Naruto Shippuden: Geiktou Ninja Taisen EX is just another form of button mashing. The only fighting game so far that has done an excellent job at using motion control is Bleach Wii, which responds to three simple slashes.