My recommendation: don't bother with supplements unless written by the professor who's teaching your course (depending on property, this may apply to you--I'm pretty sure I go to your school given your course list).
Here's why I think supplements are overrated: to get value out of it, you have to apply only the parts of the supplement that correspond to what your professor is teaching: is what's mentioned in the supplement applicable to and consistent w/the textbook and the professor's approach to teaching the class? If not, you'll end up learning material irrelevant (and sometimes even contradictory) to what you learn in class, which gets you nothing or negative value on the exam.
Many will disagree, but I've done well w/o supplements. The only extra materials I use are the Siegel's sample exam question and answer books in the few days before finals, just to practice applying the material. Good luck, whatever you do.
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