Hi there,
Thanks for posting! Your profile and life story is interesting, which will help you be remembered, which is always a good thing. Good luck on the GMAT, and yes scoring in that range or above would be ideal no matter what. Regarding the MSx or SF at MIT, I think you would be a reasonable candidate (though even those are competitive and have amazing candidates, so nothing is a shoo-in). If considering anything part-time, traditional EMBA options would be something to consider, at a school such as Columbia perhaps, or Stern, or Haas. Re: full time 2 year programs, I wouldn't say it's impossible but it doesn't seem to match where you are at in your career quite as closely, so you'd of course need to make a strong case for it, and acceptance rates at the very top 2-year programs are extremely low, so that makes it an uphill battle.
Keep us posted on your timeline, and how the GMAT goes, and sign up for a free consultation for a more in-depth chat with one of our consultants, as well as brief resume review, at
www.mbamission.com/consult, if interested. And/or feel free to post back here. Good luck!