Should I talk about info from their website, and say why I would like it there?
The best thing is to talk about the specific professors. Do some research, and find articles written by the professors. If you are serious about a specific area of specialization in a specific field, you will be one of the students who read articles in professional journals even though they are not required to do so for a class. Do you know what I mean? The reader will be impressed if you are "on a mission," if you are determined to achieve specific goals.
I can answer questions like this without seeing your essay, but if you want us to see your essay you have to post it to the forum. Sorry!
As for the two topics, I think you could easily blend them both to support an essay that has your GOALS for the future as the main topic. The most important thing to do is share with the reader your ideas and intentions, so that the reader knows that she should give you every possible opportunity to proceed. :-)