I have Abidal down as the best LB in the world. I refuse to rate Cole, purely because I don't like him. Evra doesn't seem to be as awesome as he once was.
I dont watch any Serie A so I can't judge any of their left backs.
I think C-Ron would ruin the balance of Barca.
Carles is still class though. I think they just need to start blooding their youngsters ready to replace Abidal,Puyol and Xavi, although I think Xavi can play till his mid thirties.