Have you considered taking the GMAT for a second time? The reason is that, let's consider Chicago Booth (which has a similar GMAT score to the schools you are targeting). The average GMAT score is 720, with an 80% range of 660-760. If you applied to the school, your score would be in the bottom 10th percentile. This doesn't mean you wouldn't be accepted, but it is not a preferable position to be in.
Your GMAT score is self-reported on your application, so admissions teams will only focus on your highest score. We also have free GMAT advice here: http://www.stacyblackman.com/tag/gmat/
Hope this was of help.
Conrad and the Stacy Blackman
Interested in a free 30 minute consultation with the Stacy Blackman Team? Sign up here: http://stacyblackman.com/contact
Stacy Blackman | Stacy Blackman Consulting Inc | http://www.StacyBlackman.com | +1 323.934.3936
MBA blogger, US News and Author, The MBA Application Roadmap