If you want to do admin, are you looking for a theological degree? If it's not a theology degree, I'd imagine just about any reputable state or private university would work. Maybe for ministry, they'd prefer something that wasn't too liberal. But if you were doing business administration or something along those lines, there are a lot of options. Grad school is usually hard, even if you don't go to a top name school. Trust me, I've gone to a school that ranked fairly highly and one that doesn't rank that high and both are hard. The smaller, less reputable programs sometimes aren't as well organized and don't offer the same support. So there are advantages to going to the higher profile schools with good rankings, too