I just Beat The GMAT!

Sigh. I first visited this site a month and a half ago, and received great advice from various members. Feeling good this morning, I made my first attempt at the GMAT and scored a 670. I'd love to hear from the community again regarding what my plan of action should be. My profile is as follows:

GMAT Score: 670 (43Q, 39V)
GPA: 3.9 (I'm not exactly sure if I've converted it properly, but I basically have an 85 average, Commerce Program at a Canadian University). What's strange is that my highest marks are quant-heavy courses such as Accounting, Finance, Financial Markets, etc.
Work Experience: I'm currently in my last year of undergrad and have one semester left. I'm hoping to work full-time at a top investment bank once school ends (but who knows if the job will still be there by the time I'm done school).

Assuming the contract isn't voided and I apply to b-school after two years at this investment bank, what are my chances for getting with my current GMAT score? Should I rewrite the test soon, or should I simply wait until I start work?

As always, the advice is greatly appreciated.

Thanks!

Sorry, forgot to mention that the b-schools I am hoping to get into are institutions such as Stanford, Wharton, Harvard, etc. As my undergrad degree is a BComm in Canada, I would benefit the most if I did my MBA outside of Canada.