20-30 Points Worth Retaking?

Hello,

I just took my second GMAT today and received the exact same score as my first exam in both the quantitative and verbal sections. I studied inconsistently throughout 30 days, but am still pretty disappointed that my score did not go up! During the test ALL my questions were geometry or number properties. The quant section seemed considerably harder, while I breezed through the verbal with 15 minutes to spare (with time to double check all my answers).

I ended up getting another 680 (Q43 65% V40 89%). In my practice exams I have gone from 510 -> 750 on MGMAT and the Prep tests. Honestly I believe that I can get another 20-30 points, but I will have to dedicate time to learning the new GMAT as well.

At this point, I really have two options:
a) Apply to my dream schools (top 10) and slam the rest of the application out of the park or
b) Take 1-2 months to learn the new GMAT format in hopes of gaining 20-30 points

What is everyone's advice?

Thanks for any input!