as a Soto owner i would have to say Soto.
Napoli is interesting but i really dont see him playing as much as he should the Angels are going to use Mathis and with Matsui at DH then Napoli wont be getting much time there. Napoli had 114 games last season and with the defense from Mathis maybe Napoli doesnt even get that in 2010.
Soto had bad luck last season. i dont think Soto is as good as he was in 2008, but he could get back close to that.
none of the others really impress me for starting full time. if your platooning C then Baker could be good. i dont think he plays all the time in Florida as he splits time with Paulino? but Baker is good against RH pitching.
but if he is splitting time with Paulino then your going to need another C to fill in.