Even if Broun cleaned up with the rural vote, he could still lose by underperforming in the Atlanta suburbs because he’s an outspoken creationist (not to mention a fellow traveler of the Paulbots). If he can’t get 55%+ in counties like Cobb and Gwinnett, or over 70% in the suburbs north of Atlanta, the Spawn of Nunn will beat him. While I don’t think that Broun would be an underdog against Nunn—it still is a midterm election in GA in a bad environment for Democrats—I definitely can see Nunn beating Broun, while I don’t think that any of the other Republican candidates would be in any danger of losing to Nunn.
My preferences are Handel, Gingrey and Kingston, in that order.
Gingrey and Kingston are just Saxby and Johnny. They will run up to DC and vote for amnesty in a heartbeat. They will be Mitch’s beaches.