Hi Deuce,
I know I'm in the minority with this opinion, but I actually wish that I had relied more heavily upon Robbins (Basic Pathology, not big Robbins) for my 2nd year studying + boards prep. I think it largely depends upon how you best learn - BRS Path is essential, but I had trouble retaining the in's and out's of the pathophys just reading through line after line of text in BRS Path. When it came down to D-Day for Step 1, I found myself feeling most comfortable with questions on topics for which I'd used both Robbins and BRS Path in conjunction - i.e., do a quick once-over read of the BRS section, then read the appropriate section of Robbins, and refer back to BRS Path again. The color photos in Robbins really stuck, and I found myself better able to understand and recall details by thinking about the images.
BRS Path is terrific for condensing the material into a high-yield format, but for solid understanding, the Robbins' books are great. If you feel comfortable w/ the mechanisms & the pathophys from class, though, then Robbins might not be necessary. I'd just recommend gauging how comfortable you feel with the material as you begin classes.
Good luck! 🙂