Leaving aside strategic questions and what you think of their opponents, which of the US Senate candidates do you especially want to win? That is, which of the Republican Senate candidates would you really like to see in the Senate?
Here's the list for the competitive seats: Fiorina, O'Donnell, Boozman (I guess that counts as a competitive seat), Coats (ditto), Angle, Rubio (or Crist?), Miller (or Murkowski?), Ayotte, Kirk, Raese, Buck, Blunt, Paul, McMahon, Portman, Toomey, Rossi, Johnson. Which would be, say, the five you most want to have in the Senate? Which three are you least excited about? (Feel free to include Burr and Vitter, although it looks like neither is going anywhere).
Remember, the question is about these people as prospective Senators, not the difference between them and their opponents (in which case the answer might have to do with the biggest changes in voting records) or just how much you don't like the opponent.