In my opinion the best place to study Spanish in So. America is Cordoba Argentina. It´s in the center of the country and easy acsess to the whole country. It´s also a University town with many activities with a diverse culture.
I was going to go to another school but, SET Idiomas came highly recommended. I´m glad I did as I ended up with a broken leg. The school came to my rescue. They handled all the translations and made my hospital stay comfortable. The school went above and beyond being a school. They were like family. If your thinking of learning Spanish or any other language look no farther. SET Idiomas is the school for you.