TAKE IT IN AUGUST
my reasons:
you will have more time to study
you will probably get a higher score
you will still be considered an early applicant (i think)
you will have more time to practice PAT
you will take the DAT once, and only once
you will be motivated to do well, since retake (90 days) would be kind of late
you will score high on the RC section
the final choice is yours...