Macbook Air or Macbook Pro (with retina)

Hey everyone! I am trying to figure out which laptop would be best for me next year. I’m going into the College of Arts and Sciences with the intention of being a biochem or biology major and I plan on continuing on to med school. I really want to get a mac, simply because I like their system a lot better than windows (I’ve had some pretty horrible experiences with other computers). No matter which version, I am going to get a 13’ with 8 gb RAM and a 256 gb hard drive. I’m just not sure if a pro or air would be better. With the upgrade of RAM in the air, it puts them at about the same price- about $200 difference. I like to watch Netflix and youtube videos, but nothing too involved. I have a lot of pictures and music as well. It’s main use will be for research and writing papers and assignments. I have one concern for each of them- with the air it is that it tapers and is really thin on one side- it seems pretty flimsy. With the pro, it is the price difference. Any experience or personal opinions are welcome, I just want to get this figured out so I can go ahead an buy one.