Are you talking about Matias Fernandez? For 4M? If so, stop wasting time and get him. The other two are not a patch on him! But somehow I doubt you're talking about Matias. The only other one I can think of is Augusto Fernandez who's not worth it.
Out of those, if you want someone who can really take control of your midfield (and assuming you're not talking about Matias) get Arteta. Guzman is not as good as Arteta
imo, but is SO versatile.