If we continue playing the same boring system of football, only super talented forwards with technical ability will be able to score for us. Ex: RVP, Messi, Ronaldo etc. You can have Nistelrooy (in his prime) play in our system and he wont score more than 10-12 goals a season for us.
Dzeko would be a great buy but he gets great service and is encouraged to be in the box to attack the second balls. He will be in unfamiliar territory if he comes to Arsenal! Oh, do not forget City also play with 2 up front while we play a 4-6-0: the very much inferior model compared to Spain or Barca.
Like some have mentioned.. its not that we do not have good players, I think we have some very good players to challenge for honors... the problem is the fucking system of play! The stark difference in what we used to look like up till 2008 season (Eduardo injury) to the garbage we see now is astonishing!