Treadmill or Elliptical? Which to Chose?

It is time to start exercising. I need to do something. So I've decided to buy a piece exercise equipment. I have been looking at treadmills and ellipticals, and I truly can't decide what to buy. I am sort of leaning toward the elliptical machine, but I'm just not sure. They both have the same advantages and gizmo's. The money is comparable also. I guess I will just have to think on it.