We both want zomething different, so we have decided to start another team (not abandoning our current teams though).
He will use Chaos, I want something different. I expect his team to become a monster in some games after the first few... claw, block, mighty blow, and some ballhandling skills on 1-2 beastmen.
He's been quite succesfull with a team like that before.
I want to use a team that will give him a run for his money (well, if possible). I've ruled out Orcs and Undead. I also dont want to use any Elves I think. Well, maybe Dark Elves...

Anyway: please vote for the team you think has a decent chance, and will make for interesting games vs. a Chaos team that (probably) will run rampage after a couple of games.