my school recommended stryer and the huge "Cell" book. I kind of found this to be an overkill. I had a semester of biochem in undergrad and used Voet and found it more than adequate. Voet is however very big on mechanisms, so am I. Evaluate the expectations your course directors have of you and what you have of yourself. My school is pass/fail so generally I was at liberty to choose the book I felt most comfortable with without the fear of jeapordizing my grade.