I'm glad I posted this thread. After getting your responses, I've gone back and begun reading reviews from worst to best on the BFGs and the Dunlops. Schroeder02, do you run the Direzza Z1s yourself?
My only track experience with my 2012 Focus, has been one track day at Willow Spring's Horse Thief Mile. The stock front Conti's shoulders are badly torn up from that.