Should I go for IB or stay within my BB back office post grad?

Hi, 

I'm a 2nd semester senior at a non-target liberal arts school. 

I have an offer to return to a BB internal audit department. Right now, my resume has a private equity (at a search fund) internship, investment banking internship (boutique) and a BB internal audit internship.

I'm seeing traction to be placed in a IB boutique come Feb - March of this year. If I land an offer, at a no name IB regional boutique, and want to eventually work in IB should I go and drop my BB internal audit job? Or should I focus on going back to the BB internal audit, start my career in a notable company, and see where life goes. I can try lateraling internally, or try and go get a MBA in a few years. Are there any routes I'm not seeing? Any suggestions on a game plan?