I don't know too much about North Carolina State University, so I can't help much there. But I do know UT has a great reputation for bio, and I'm pretty such they have collections there that you can use in your research, so that's a real benefit. They also have a lot of resources in terms of labs and funding that you probably won't find at smaller schools. If your looking at Megan Perry at East Carolina I've only ever heard great things about her. As for Mississippi State, I'm currently at Southern Miss and I've heard great things about their program from their students. I'm pretty sure they have two birch faculty that are pretty great and they have active field programs which is a definite plus. If your not opposed to Ole Miss, I would look into them too. Carolyn Freiwald is absolutely great!