Obviously there's a very rankings-centric school of thought on this forum, and I probably buy into it most of the time.
But I think you have a difficult choice.
I work in healthcare finance, sort of a niche industry. Salaries are good, not like banking or some super-lucrative industries, but I would expect to be making like 100-150K if I came straight back to healthcare after b-school (not my plan right now). I met with the CEO of my company who is a Harvard MBA and asked him what he thought about my overall plan.
He said that he really doesn't think the brand name matters very much in this industry. Partly because healthcare really needs MBA's right now, it just doesn't need that cream-of-the-crop type super-ambitious person that a McKinsey or Goldman needs. Obviously there are a handful of schools that will always make your resume stand out, but I think in my industry, a diploma from a school ranked 10-20 versus a school ranked 40-50 wouldn't make a big difference. It sounds like that may be the case with your industry as well.