Thanks for your post. For your GMAT score, we normally recommend that if a person believes they can improve their score by 30+ points, that they re-take the exam. The reason is that your highest score is self-reported on your application, so admissions teams will focus on your best score.
At the same time, a 740 is a fantastic score and would certainly not hurt a person's application at any of the programs you are considering.
If you decide to take the test again, we provide free GMAT advice here: http://www.stacyblackman.com/test-prep-hub/
We also provide free 30 minute phone consultations here: http://www.stacyblackman.com/contact/
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