You have a strong application. First, I recommend you read this case study of a female applicant who worked for a bank and was subsequently accepted into Harvard Business School and the Stanford GSB:http://www.stacyblackman.com/comprehens ... ies/case4/
If you believe you can improve your score by 30 or more points, you may want to consider taking the test again. Remember that your GMAT score is self-reported on your business school application, so admissions teams will focus on your highest score. There is not a downside to taking the test again, other than the cost and time.
This being said, your time would be best spent on your personal essays and recommendations, as your numbers (GMAT score and undergraduate record) are strong.
Here is some school specific advice for the programs you are looking at:
Wharton: http://www.stacyblackman.com/category/u ... on-advice/
If you'd like, we provide free 30 minute phone consultations here:http://www.stacyblackman.com/contact/
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Stacy Blackman | Stacy Blackman Consulting Inc | http://www.StacyBlackman.com | +1 323.934.3936
MBA blogger, US News and Author, The MBA Application Roadmap