Ballack is getting too old and I don't like his wage demands. Van Bommel is overrated and old as well, plus wouldn't help our midfield much. Panucci, Knezevic, Kroldrup, Stovini, Mantovani, Donadel... if people want those guys I think we should open up a psychiatric ward on the forums.
I chose Bastian, Friedrich, Busquets and Fred for various reasons. Basti would be a good option off the bench, Friedrich is a pretty solid RB from what I've seen, Busquets is young and hasn't been too bad for Barca, and Fred isn't a bad player either. Perhaps I'd refrain from the latter because we have enough strikers, but what the hell.