Hi everyone. I've read quite a few posts about step 1 and even a little on this subject. I have a First Aid 2003 and wondered if I should buy a 2004. How much difference do you think there is in these two versions? Before answering, I have access to BRS materials, Kaplan books, High Yield books, and Kaplan Q Bank. With all of those other sources, is it worth me spending the $40 to get the new one, or am I good? Thanks for the input.