Do as many AAMC exams as time allows (to both take it AND review/analyze it in detail), and use the Section Bank like a question bank for additional practice. Expect the real exam on test day to be a little harder than the AAMC full-lengths, but not as hard as the Section Bank. However, expect that *individual* passages on the real test will be fully of Section Bank difficulty, you'll just get a reprieve (in most cases) with a few easier passage mixed in.
Then give serious consideration to voiding depending on how you feel on exam day, and what your full-length scores end up being. I've helped 100+ students personally prep for this exam and destroy it...it has never proven to be a good thing when you feel rushed for time and have to "pick and choose" what you cram into the last few weeks. Ideally, you should go into the exam having confidently attempted and analyzed all of the best resources available to you. This helps your confidence tremendously, which always improves your score!