I'm in that exact situation now, and let me tell you, I have not gotten ANY MCAT studying done. Maybe it's just because I suck at physics, but Physics II and Organic II is a kind of overwhelming combination. I ended up pushing my test date back to June 16 once I realized that something was gonna give--either my GPA or my MCAT score. I don't think there's any compelling reason to take it in April as opposed to late May or early June, especially since (I've heard) a lot of schools will send you secondaries even without an MCAT score. Your secondary apps and MCAT scores will arrive at about the same time then, and you'll be complete pretty much when those who took an earlier MCAT are (except at the few screening schools). But someone correct me if I'm wrong.