Don't have any experience personally with MBA, but my familia does so here are my two cents:
My brother went to a top-tier MBA school, had a helluva time trying to land a job (his top choices were Bear Sterns, AIG and Morgan Stanley...go figure) and the reason he finally got his job was because he took a class from an adjunct professor who ran a small firm. The prof liked my brother and hired him. That sort of thing PROBABLLY wouldn't happen at the University of Phoenix...just saying. All of the top MBA schools (Northwestern, UCLA, Harvard, Wharton and Columbia) are huge into recruiting military officers, both separated, active and reserve. They have associations/clubs dedicated to helping mil people network and survive the programm. If I were you, skip the online any degree, especially MBA and take advantage of EMBA/full-time programs at top-tier schools during shore tour of if/when you get out.
Again, I'm nary more than a Midshipmen, but my brother and dad both got MBAs so I hear about the stuff cooooonstantly. Hope this helps