Anatomy is not a big deal, on the MCAT. Physiology is probably more important than anatomy IMO. Biochem, specifically the metabolism portion is pretty helpful.
I personally took the MCAT without taking anatomy of physiology, got a 11 on the bio section. I find that aslong as you take a prep course and attend the lectures on physiology, you should be good to go.
A&P is all memorization. No doubts about that. If you have a photographic memory, even more reason why there isn't an urgent need to take those classes. I say go with Biochem, since it seems to cover a lot of areas from Ochem, enzymes, and metabolism. More bang for you buck i think.