Spot on. I mentioned this a few years back about how City went backwards under Pellegrini and sold good players such as Tevez and De Jong for example and then brought in the likes of Bony and Fernando.
You can't rest on your laurels and the biggest mistake we could make is getting complacent and taking the foot off the gas. This team is on the verge of something very special, we need to keep freshening this group of players up and continuing to add players to it of the highest quality. Our fans may think that nobody will touch us even if we don't sign anyone this January or next season, but you never know. We all thought as soon as Mancini won the league we would kick on and build a dynasty and as you say, Utd won the league comfortably the season after because they went out and bought quality over quantity. As good as our manager is, as good as our team are playing right now, we need to keep putting our foot down on the accelerator. Making sure we buy Sanchez will only push the chasing pack further away from us. We can't afford to let other teams bridge the gap, we did the same with Van Persie, we did the same with Eden Hazard, lets make sure we get this Sanchez deal done and dusted.
I do however think that we are red hot favourites for him, but you never know in football. Money shouts.