Sure.
Needless to say, City had the best mercato this summer. They bought David Silva, Boateng, Kolarov, Milner, Balotelli and Yaya Toure.
All are great signings imo that will make City one of the big teams in the EPL this season. Toure has been their best signing up till now, the guy is so dominating in the middle, but mind you he is playing as an attacking midfielder in a 4-2-3-1 with City. Balotelli is an important signing in the long term obviously because he's a big talent, one of the biggest in Europe. Then theres Kolarov who would have been important if it wasn't for his injury, granted, he had an average debut imo.
We had a poor mercato due to the simple fact that we didn't get a keeper. We got two centerbacks in the form of Koscielny and Squillachi, neither of which would be even close to solving our defensive problems, the latter especially is quite an average defender. and we bought Chamakh who most of the time can't finish to save his life, but he's a very good target man, he works hard, and he links up very well with his teammates, i think he would be a useful signing, especially due to the fact that we won't be seeing Bendtner too much anymore.
Chelsea lost a lot of players, and didn't really replace them. But i still think Ramires depending on how long he takes to assimilate to a new country and a new league, could potentially be important to Chelsea. Benayoun is good backup for the wings. Still, they lost J.Cole, Carvalho and Ballack.
Fulham imo made some very good signing for themselves. They bought Rafike Halliche, the Algerian centerback. They bought Carlos Salcido the Mexican from PSV, they bought Moussa Dembele, a talented left footed Belgian that used to play in the Eredivise. Oh and they got Senderos too
Liverpool bought in Meireles, Konchesky, Aurelio, Joe Cole and Jovanovic. Most of them could turn out to be very good signings, especially Cole and Meireles. But losing Masch could be too big a blow for them to handle, i rate him highly and i believe he's a world class midfielder(i don't use the term lightly)
United didn't do much. They bought Smalling, a young English centerback from Fulham. but bringing in Hernandez could potentially be a very good signing for them. He's impressed in the first few games he played with United.
Tottenham have made a few good moves too. VDV was a bargain for them, just 12M. Also they bought in Pletikosa for cover, and a young Brazilian midfielder called Sandro who is supposed to be a promising defensive midfielder. Oh and they got the moaning bitch Gallas who could be a very good signing for them, paired with King, they could potentially be a rock solid defense. Well thats if Gallas doesn't throw another one of his tantrums on field and cry like the little bitch that he is.