Mine would be
Zab..Toure..Nedum..Bridge
for me, Zab is our best right back. Richards is poor going forward, he cant cross, and never knows what to do when attacking (defensively fine though, and it worked well against Blackburn when we needed his ability in the air). Personally I don't think Richards is a very average right back, but could become an excellent centre back.
Nedum, I think is just as good as Lescott, with the potential to be even better, thats why I'm not too convinced with the Lescott deal at the moment (My opinion might well change if he plays well though).
I feel a bit harsh on Dunney because he has been superb for us this season, but with Lescott signing I think this unfortunately will be the end of Dunne at city. Once again, I don't think Lescott is any better than Dunne
Ben Haim I actually don't think is as bad as some people think he is, but I very much doubt he would get near the team now so I think he will be the first to go.
Toure is absolute quality so would be the only defender I think we have got, who is more or less guaranteed to play nearly every week
I also prefer Kompany in the midfield. I'm sure we will find lots of reasons to play Kompany and/or DeJong over the season
Bridge has been very good this season so I don't see the need for him to be dropped, and I have no idea if Lescott is any good at left back, but obviously would provide adequate cover to Bridge if needed