Congrats on setting yourself up for a career with lots of opportunities! Honestly, I think the general track will provide you all the prerequisite courses you'd need for a master's in Biomedical Engineering, and as you said, most graduate school programs will specify which life science courses you need. However, I would just look up a few Biomed. Eng. masters programs and see whether they require the GRE-Biology subject test. If they do, then taking the organic chem, biology, and chemistry courses will be helpful for that test. If they don't (and they only require the general GRE test), then you should be fine with the general EE track. My experience has been that "Biomedical Engineering" requires more of a solid engineering education primarily, and biomedical education is secondary. Best of luck in your endeavors!