Let's eliminate some candidates.

People keep asking me who is best for the Republican nomination for President.

Trump has said he is out. Good thing, too. He's a liberal with *meh* ideas on how to financially run the country.
Pass

Newt Gingrich is in. But he likes Obamacare. Seriously, he's an establishment (read: liberal) Republican, with no true conservative values at his core.
Pass.

Mitt Romney signed into law a Massachusetts version of Obamacare in 2006. No true conservative values.
Pass.

Huckabee is out. He said so this weekend. Good thing, too, because at his core, he's a tax-and-spend democrat.
Pass.

Ron Paul is in. The pros are that he really gets it. He's likely the smartest man in Washington (only exception might be his son, Rand). He would do a good job. Cons: I don't see folks "in the middle" voting for him.
Pass (with potential to change that)

Mitch Daniels might run. And he might be a good candidate. What frightens me is that in his first term, he raised taxes to balance the budget (and it didn't work). What makes me OK with this to an extent, is that he realized it didn't work, so they then lowered tax rates, and slashed expenses.
Possible. 

Herman Cain. He has not officially announced - but he'd have my full support.
Definite.