I agree with Behavioral. Recently there have even been articles written about the ROI on a MBA from Wharton. School name is everything. If your MBA is outside the T25 you are going to find yourself having a difficult time paying the $1k/mo loan payment from the $100k degree. I obtained my MBA from NYU Stern, and the organizations that recruited at NYU (which I think was T11 last year, depending on which ranking you "trust") are amongst those that recruit from the T10, though Stern may get 2 or 3 less placement seats than a T5 school. One of my good friends earned his MBA from BU and it took him over a year to find a FT position; schools in the T25 for the most part place all their students, though all the students may not have received an offer from their personal top company. Also, good schools will really assist you in obtaining a strong position post graduation because it's vital to their statistics and ultimately their ranking.
The vast majority of b-schools now accept the GRE so you should not have a problem in that regard.