We have had numerous base configuration MBAs in our family over the past 12 years, and never had a problem. They are great for office work, college, and casual home computing.
Sometimes it's helpful to compare your needs with a relatable example. The example I most often think of is the "typical" college student (Business, Econ, Social Science, etc..). Two of my "kids" were Business and International Relations majors, and their base MBAs were perfect for their needs. One got a masters in Public Health, and used a base MBA with no issues. Don't get me wrong. College students use their laptops a lot. So, if you think your needs are no more taxing then go for the base model and don't worry about it.
However, if you will be running speciality applications that are resource intensive, then you should probably get the Pro with more RAM. My third child was a Math and Econ major, and he wrote some pretty complex scripts and algorithms that were resource intensive and also required a lot of storage. So, he needed a more powerful computer.