How much progress have you made on your applications? If you have already put a lot of time and effort into your essays and applications and you are ready to apply for Round 1, I do generally recommend applying earlier. I have worked with many applicants with similar GMAT scores to yours who got into the schools on your list.
However, if you feel that your applications could still be improved, then it is likely worth taking the extra couple months to improve your GMAT score and tighten up your essays so that you really have the best possible application package. If you do not feel 100% confident at this point, it is best to wait.
Founder/CEO, Stratus Prep