You didn't mention internationals. You said "certain Spanish midfielders". Ergo - Mikel Arteta.
Re: Nasri - I don't think he'll flop immediately (clearly he hasn't), but in the LT. Think it was Jamie Sanderson (Young Guns) saying how difficult Nasri found life in England/at Arsenal at first - he had Meningitis or something early on, and only did well in the end because the help that Wenger was constantly giving him, on and off the field. He argued that Maninci isn't really the kind of character who can offer Nasri that and even if he is, it must be difficult for the players if Man City are changing managers every other season if they don't win the league, or at least something.
Ergo - he'll never quite be the player everyone knows he can be. Even at Arsenal - after a brilliant start to the season, he fell away. He's never really provided world class quality on a consistent basis.
I do think Clichy'll do well though. Good signing for any PL side IMHO, but wasn't working for him at Arsenal for one reason or another.