Well, this is something I've started for a contest. There's no poly limit, but the lower it is, the better. Especially with the amount of detail that's going to go into this. I started 2 days ago, and this is what I'm left w/, currently at 2.7k tris. I am aware of a few smoothing errors.
[Blocked Image: http://i1.tinypic.com/mic9au.jpg]