Sorry it took so long - have been a bit busy.
I'll only mention the pure science classes, since I've already mentioned most everything else.
Biochem and Pharm in the Fall
Physio, Immuno, and Endo in the Spring
There is no option with biochem, so i have nothing to say. Yeah, it is hard, but I think an A- is relatively easy. You have to work for the A.
Pharm is an easy class, but I found it boring. It is 4 credits though, and it will require 4 credits worth studying/time commitment to the class.
6 credit physio is not very fun - it is very intense, very fast, but certainly A-able. If you take 6 credit histo with it, you will have no life - but STILL, certainly A-able (both).
Immuno and Endo are relatively easy. The only issue with immuno is that physio (6 credit) is ongoing while immuno begins, and ends. So, Physio is like Jan 26 - April 26 or something, and immuno is like march 17 to april 26. Approximate dates of course. So exam week of April 22ndish sucks. I believe there is a histo exam (6 credit) that week as well. Endo starts after physio and immuno are over. Only histo is ongoing at that point.
I think splitting the classes A/B do give you a better shot at getting A's, but of course there is always the possibility that taking 6 credit "looks" a bit better, seeing as how you actually sit in with the med students and are graded against them, not just your peers.