Course Dilemma

Studying at IISc is a unique experience. All courses here are open ended in every sense of the word. It is perhaps the only institute in India, where a guy who has signed up for ME(Microelectronics) can pursue courses such as Bioinformatics, Quantum Computation, etc. For a guy, who didn't even get to choose his elective while pursuing his BE , the experience can be quite disconcerting. As of now I am quite confused on which courses to choose. I might take up Nanoelectronic Device Fabrication or Quantum Mechanics or Quantum Chemistry or Convex Optimization or Quantum Computation. Hell, I feel like a kid in a candy shop so many gr8 courses taught by profs of great repute of which I can choose only 6.