Thanks to all of you. I realize that there are several options in California, I will consider them. I know the work of Wolfe, it' s really good but I was a little scared of applying to Stanford. I know also some papers of Vitz, he was here in Mexico two or three years ago, but you are right, it is more in the urban way.
I have in mind Colorado and Davis also, they seems to be very good options. Maybe I'll be asking you some things Ashiepoo, when you get used to the Davis faculty.