Which cellular company is better US Cellular or Verizon?

I am trying to decide but its kind of hard most people I know have US Cellular where I live. I looked at there coverage map and they have service everywhere. But they don't have much of a large selection of the phones. But verizon kind of does.
I go a lot places out of the state like Virginia, Maryland, Florida, New York and possibly other places. I live in North Carolina, I am not sure who is better.