Education path

I am finishing up my senior year for a BS in Biology at the University of Missouri in Kansas City. Recently I have gained an interest in becoming a nurse anesthetist. I was wondering what I should do after I graduate. I have noticed that some nurse anesthetist programs which accept non-nursing degrees upon admission. Would it be better to pursue on of these schools or to go for a BSN first? From what I have gathered so far the latter was the best option due to the need for ICU experience, which I would have none. What should I do? Also, do you know of any programs near or around Boulder, CO? Please help.
Daniel