Vatreni,
It's a real luxury that you're thinking about this so far ahead of time.
When considering retaking the GMAT, ask yourself these three questions:
1)
Would retaking the exam help? - Moving from a 760 to a 780 might not make much of a difference, but in your case moving from a 710 to a 730 or higher for the M7 schools you're targeting could prove significant.
2)
Do I have time? - For people retaking the exam shortly before an application deadline, they have to consider whether to trade time spent on their application in exchange for GMAT prep time. You are so far ahead of the curve that you definitely seem to have time.
3)
Can you do better? - You certainly seem confident that you can do better. And if you were ever rejected by a program while you thought you could do better on the GMAT but didn't retake it, you may always have those "what if" questions following you.
Good luck as you continue down this path and please let us know if we can help you in any other way.
Jason
https://www.WyseGyde.com