If only the positive political comments are considered, who is better?

Gingrich & Romney Are "Unelectable?" So Is Obama. - Sean Trende, RCP

The above give a case for Obama being unelectable.  If so, the republicans are selecting the president.  Who do we want.

I claim the negative campaigning should be ignored since it is the result of big money and emotional mud slinging.   If Mitt Romney is a go along guy (That’s not negative is it?) and Newt is a bomb thrower, which do we want in our next president? If things were ok, then the go along guy won’t spoil things.  If things are terrible, maybe we need some constructive deconstruction, i.e. a few bombs thrown.