Need advice 660(q50 v30)

Hi,

I got 660(q50 v30) in my first attempt today and need your advice to find out whether reappearing for exam is really worth it. Here is my background info:
--3.9 GPA
--Working with a major bank in Amsterdam as an IT consultant from past 1.5 years. Previously worked with a company in India for about 1.5 years; so in total 3 years of experience.

I want to check my chances for University of Chicago, Booth or University of Michigan, Ross.
I would really appreciate if you guys can help me decide whether shall I reappear for test or not.

Thanks in advance