Brian Vickers, he's a awsome driver and knows how to handle his race car. I think after he wins the Busch championship(I hope), maybe he can come close in the Winston/Nextel (maybe).
I'm also going to go with Brian Vickers for the Busch Championship. He has been on a great streak lately with 4 top 10s in the last 5 races with 2 wins.
I voted for David Green because I think the difference in experience in a championship hunt between Green and Vickers will cause Vickers to choke later in the season.