fearfrost,
here is my 2 cents worth...
I was in the same position you were, what to do next?
my father once told me when I told him I wanted to just get into biotech...."if you don't have a degree like a PH.D. or MD, you will always be told what to do...ifyou have one of those, then you will tell people what to do" I went for the Ph.D.....
takes more time, the degree is actually paid for and you get a stipend (fyi, Weill Gradschool /Cornell in NYC pays the highest stipend in the USA-my alma mater)
They actually have a neat program hooked up with the Johnson school of business (yes, Cornell) for a 1 year MBA when you are done with the PhD.)
here is another 2 cents, MBA girls are MUCH cuter.....they dress better....
but that is just my opinion...