I have never heard of Man City ever interested in Skrtel, why would they anyway if they can attract top defenders like T. Silva, Cheillini etc with the money they're offering. Funnily enough, I have never heard of any genuine rumour that Liverpool are interested in AJ either.
I would rather keep a player that has forged a good defensive record when his partner (agger) was fit. As someone already mentioned, AJ could pretty much turn into another failed british player and surely we don't want that after the transfer debacle of last summer.