Hi, I'm not sure if this is the right place to post this question, but here goes. What are the top three math journals? I want to purchase a few but seeing as they can be a bit expensive (I am a starving undergrad ) I want to get the most for my money. I just reached the point where I feel I have enough background to finally start understanding some articles. (I will soon have calculus, differential equations, and linear algebra behind me.) Also, which areas of mathematics has the most opportunity for new research?