You will need to find a focus for a PhD, but everything you mentioned is possible at U of California-Merced (http://ih.ucmerced.edu/), where half the students are Hispanic and it is located in a town that is half Hispanic. The program also offers a concetratuion in Luso-Hispanic World studies (http://ih.ucmerced.edu/content/multicultural-luso-hispanic-world). As far as getting into a top program goes, the top program is the one that best matches what you do as a scholar. In the end, you have to do the work that will make a name for you, and that can be done at any school.