Just to jump in on your Nasri - Silva debate, I think the fact that Silva played so much last season, means we at least have a replacement for him should he pick up an injury or be given a rest (if Nasri signs). Without him at times last season our creativity took a serious hit, so this should benefit Silva also.
Certainly for the first part of last season Nasri looked the genuine real deal, he was on fire, but that seemed to peter out as the season progressed. Fatigue ? Or just being pushed wider on the park ?
In terms of where he'll play for City, I think there is a good chance he could be used in a three-man midfield when we're looking to be more attacking, so in place of Gareth Barry. He may not quite have the licence to do as he pleases, but will naturally support the front three and link up more effectively than Barry.
As you guys have alluded to, his best position may well be in Silva's position with the freedom to roam as he pleases, but from what I've seen, he doesn't have the creativity, skill, vision and touch to match Silva, but could well prove a more than useful addition.