Have seen a lot of games with Dzeko, and I recommend that the club get this lad in fast. He's a physical, fast natural goalscorer, who could be a true asset. Torres is also a class forward, but he's not in the best shape, and it would be stupid to sign a injury prone player, who's not really interested in joining City.
If none of these players are interested, we should look to Spain. I think Llorente have what it takes, to perform in the premiership.