I believe that he would choose Sakura!
He may go to pick someone else, although i doubt he would actually got for Sasuke, there is nothing in the anime that would indicate that he likes him more than Kakashi or Sakura or even the rest of his friends. He just doesn't want to lose him....
He might go to save kakashi, which is doubtful considering he's older and would rather die than watch Sakura Die. He would probably tell Naruto to save Sakura.
Sasuke would do the same thing, as he wouldn't allow himself to be saved by Naruto anyway, since he believe that he's superior to Naruto!