Hey! I'm a linguistics undergrad on course to start an M.A. Have you thought of what kind of linguistics you'd like to study? Different schools have different reputations for different schools of linguistics.
For instance, I study generative syntax at the University of Manitoba (though I'd like to do both generative syntax and sociolinguistics). Although I chose the school more for economic reasons (I'm paying my own way through), I am lucky enough to study under a generative syntactician who is of some renown. Though I didn't have the greatest opportunities available to me, I do know enough about Canadian (and some American) universities and their respective Linguistics departments.
Cognitive Linguistics (especially if you wish to study polysemy and metaphor): Berkley
Sociolinguistics: Stanford (Language and Gender, and Language and Ethnicity) McGill (Standard Canadian English) University of Toronto (Sociolinguistic Theory)
Generative Grammar: My personal opinion is the University of Toronto for this one, but that can be debated. MIT is a good choice if you want to have access to Noam Chompsky, the father of generative theory. Though I believe he doesn't instruct students anymore, he is supposedly always available to speak with.
Phonology and Phonetics: I can't remember what's good for these - I'm not a fan of these disciplines.
Psycholinguistics: I'm thinking Berkley again, but I'm not totally sure...
If there's a discipline I've skipped over, just ask me - I'm sure I'll either know something or can find out for you.
Also, it's entirely possible that what you wish to study is the study of World Languages. Linguistics is the scientific study as language and human faculty for language. It is not the study of specific languages, but many linguists know more than one language so that they can have more data to draw upon.