Here's my two cents,
I was just like you, all I needed to do on the computer was surf the internet and check e-mails. I formerly owned a 2008 unibody macbook--which is drastically similar to the 13" pro. I liked the portability and also the sleek style. However, after owning it for about a year and a half, i decided i wanted the bigger screen. The 13" became a bit too small for me, I would use my friends' bigger macbooks and decided that I wanted to step it up. I now have a 15" i7 with antiglare screen. I really like the antiglare, and fell in love with the screen at the Apple Store, i just had to have it. I know that the i7 is overkill for just reading email and browsing, but that's the only model they carry in the store that has an HR-AG screen.
As for your situation, my guess is that you will love your 13". It will be perfect for what you need it for. In the future, you may upgrade to something higher up if you see fit. I believe that every Mac owner should own a 13" MBP at least one point in their lives. It is literally the most sturdy, lightweight, stunning laptop. Especially when it's mobile. It is perfect for a student, however once you get a mac, in my situation at least--you'll always want to upgrade.