Pawlenty isn't a serious contender. He has all the charisma of a wet sock. Huntsman has to explain the whole working for the enemy thing, and he's the mormon without all the money in the fight. Good luck with that.
Daniels might be dangerous if he cared enough, but apparently he's a crappy campaigner and doesn't like actually campaigning. Which leaves us with Romney, which is where the GOP will end up anyway. Barring another economic disastrophe Obama will beat Mittens. Unemployment is currently at 8.7% and still dropping; stupid deficit rage will probably dissipate as people realize the alternatives are gutting entitilements or, god forbid, raising taxes on the rich. Romney will be forced to constantly tack to the right during the primaries and then try to moderate during the general- he'll end up having to explain himself so much it will be hilarious.
Of course, the GOP will almost surely keep the House and will probably win the Senate too due to the number of Dem seats up for election this cycle. Which will make Obama even more ineffective... he hasn't been, really, but wait until the GOP is smarting from not beating him. He'll get impeached for being black or something, wait and see.
Honestly, the real fun of this election will be in figuring out who the Teatard alternative to Romney is and watching how long they stay in the race. I'm hoping for a '92 Buchanan-esque party split all the way up to the convention. I bet Michelle Bachmann could pull it off.