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I took the GMAT this morning and received a 720 (95%) - (44Q - 70%, 44V-97%). I think I did all right on the AWA, but I had a lot of trouble sleeping and am certain I can do better on the quantitative section. I am applying to receive a Masters of Science in Finance, and some of my target schools are the London School of Economics, Oxford, and Princeton. Overall, I plan on applying to programs with varying levels of math, since I am uncertain what I really want to do.
I am 24, have no real work experience, and graduated from the University of Oklahoma with a B.A. in economics and a general business minor. I graduate summa cum laude with a 4.0 GPA, and I won some small award for a research paper. I also took a decent amount of math, including calc 1-3 and statistics. If I need to, I can take linear algebra, diff eq, and other courses in the spring of 2009. Also, I had a few part-time jobs in tutoring/teaching saxophone lessons, but I did not have any extracurricular activities that would stand out too much.
As for the GMAT, I got a 760 (49Q, 44V) on the second practice test I took, but I think I could do better on that with a bit more practice, especially on the quantitative section.
Should I retake it? Do Msci Finance programs look at overall GMAT or individual sections more? Are there other aspects of my profile that you think I should improve? I am applying for 2009, so I plan to complete most of my applications by the end of the year.
Thank you very much for the help, and I apologize if I left out any important information.

Thank you very much your input.