Should I major in Bible Studies or Theology?

I'm working toward being a pastor, and I'm not sure as to whether to pick a Theology or Biblical Studies major. I'm actually going to be double majoring with Psychology, as I feel called to help those with mental illness, both as couselor and possibly researcher, eventually. I also think that there would be benefits to understanding psychology as a pastor. Anyway, I'm not entirely sure as to the differences between the two majors, which one would be preferable for a pastor, and which one would lead more easily to a Doctorate of Divinity which where I see myself ending up. Any advice or experiences from others who are either already pastors or those on their way to fufill their calling (especially those double majoring) would be appreciated.