never use wiimote/nunchuck. just think of the mechanics you'll have to perform with the game and where they would match up. its not set up for smash. you do your special with a trigger? terrible lol
CC is said to work good. not AS good as GC but if you have nothing towards melee then go for it. the control sticks are wii control sticks and therefore more responsive. and the buttons are positioned well enough that you can reach them with relative ease. i personally have bought one for brawl because i want to learn how to use them (the reason being my faulty and broken GC controllers)
but remember. brawl was DESIGNED for the GC controllers and was originaly supposed to be GC controller only so from a button layout point of view they cant be beat.