As to the question of who I'd pick if there were no "none of the above" choice. Gingrich....

Bachmann, Perry and Cain would stumble along in ignorance, doing great damage for several years. Gingrich at least knows how it all works, and like Nixon, would keep the wheels on the rails...but like Nixon, he'd eventually do something totally illegal, and we could impeach him....

(Ron Paul would ensconce Rand in some high office, and together, they'd totally dismantle the working parts OF government.Then China would call in it's loans and take over.)