I want to say Lebron purely because he is the King. But just to throw in a couple more names here.
Kevin Garnett - If the Celts have a good year, he will be the one the public and voters will look to. He has performed thus far and the Celts have certainly turned heads.
Dwight Howard - He may still be a couple years away, but this guy is dominating the paint and is showing why they call him the man-child. He's got more dunks than most TEAMS in the NBA. If he stays healthy and consistant, he could give the MVP a run.
Steve Nash - Need I say more?