fastjoe; well tough question. i can tell you that the biochem class is a very intense course. there is only one test. so if you aren willing to put the extra time needed then you should save the money but if you want to have time for other things then take the course. personally i had taken biochem grauduate level course and it help me alot. i guess if you don't have anything to do this summer then that's an option plus you get to know the school and the faculty before the rest of the class.
good luck,
siul