If anything I see Torres playing up on his own in a 4-5-1, he's got the pace and skill to get behind defences, something Crouch and Kuyt haven't - especially away from home.
You could put either of Kewell or Babel on the left and either of Benayoun or Pennant on the right - although I see them as being interchangeable and would like to see Babel high on the left in a 4-3-3 come 4-5-1 formation.