Here are my thoughts, for what they are worth

RedBull - Vettel and Ricciardo
Ferrari - Alonso and Hulk
Mercedes - Hamilton and Nico
Lotus - Kimi and Roman
McLaren - Button and Perez
Force India - Sutil and diResta
Sauber - Massa and Algusuari (a long shot)
STR - JEV and Bianchi (via Ferrari links)
Williams - Maldo and Bottas
Caterham - Kovalinen and Pic
Marussia - Chilton and Berthon