I see. Well, yes, you should study as hard as possible for the DAT. Based on the statistics I've seen, DAT scores are more important to gaining admission than GPA, but I would still choose to be in a position of having a 3.5 GPA and a 16 A.A. then a 2.8 GPA and a 22 A.A. because it takes so much more effort to raise your GPA even a little.