Razzleberry, what are your career goals? If you knew what career you wanted to have, then it would be easier to say what education you needed to have. For example, if you wanted to work in Human Resources at a company (a field in which psych is very useful), maybe you would just need the MBA plus some sort of certificate in psych, or a masters. There may be psych research positions that only require a masters, for example, if you wanted to help with analysis and delivery, but you couldn't be the head of a study without the PhD. My psychiatric nurse practitioner has a Master's and is a therapist. She works on research studies at a university providing therapy to patients in the studies. So she doesn't have a PhD, but she's not the head honcho either. I have a friend with a Master's in Forensic Psychology. She works in the legal system.

Here is an online brochure on careers in Psychology. It lists different types of psychologists and what they do. And also what you can do with a master's, PhD, bachelor's, etc.
http://www.apa.org/topics/psychologycareer.html