Like Tearstone, I am comfortable enough in my knowledge of the Dresdenverse to play at any level. But, since you want us to pick I will go ahead and pick Chestdeep.

As for starting city, I think New Orleans could be a lot of fun.

Character Concept: Well, depending on the starting refresh I would go with either a Pure Mortal(Cop), Wizard (Warden), Knight of Summer/Winter Court or Knight of the Cross. I'm pretty flexible if anyone who hasn't played the game has their eye on something specific.

The one thing I would say about people chosing a 'class' is don't worry about what others pick and choose whatever looks fun to you. No two Wizards will be alike.