Do not hesitate to aim for the best possible universities and programs. You have a liberal arts and science degree - most admissions people know what that entails. They will welcome you with open arms.

Check well in advance what your Master's required, email them if necessary. You can build your curriculum based on what you want to do after AUC. Also, European universities tend to be sticklers with rules and courses. In the US universities they care less about the exact courses, so if you have trouble being accepted based on your courses you can always apply overseas.