When you look at the attributes that Chelsea want for their CM target, doesn't a certain Arsenal player possess all of them already... at the tender age of just 20? Jack Wilshere would be the perfect player to fill that position in our squad. Most people will know that he spent all of last season out injured, but I think that he is a player we should take the risk on. His value was probably close to €30 million at the end of the 10/11 season but it would have dropped slightly after being out all year. It is extremely extremely extremely... unlikely that Arsenal would ever sell him to us (in the situation that he was actually interested in joining us too) but on the off chance that we got him... it would be perfect.
He is young, possesses the exact set of skills that we are looking for, is English and though he is only 5f7 he clearly has no issues with the physicality of the EPL. There may be some Arsenal haters out there but I think that it is hard to argue that he isn't exactly what we need.