Is there gonna be a final round with an R vs. a D?
Possibly. This forum is dominated by liberals and libertarians though so it is difficult to even the playing field
Seems like there's twice as many voting for the Dem candidates as the GOP candidates, so you could do a round with two D and one R.
Until you make up your minds between Chris Christie and Mitch Daniels, the final round will be a choice on which of the three Democrats you find least objectionable (Hillary Clinton is currently running third).