I thought about switching to T-Mobile but the reviews I've heard from people around here is it's great in the cities, but they lose coverage outside of them. According to their map, where I work would get "OK" coverage, and considering I work in a concrete building, I'm sure that means nearly no coverage.
I'm going to stick with Verizon because of the coverage. I'm still grandfathered into some good plans so my cost isn't horrible, but I have some tough choices to make with my contract nearly up and my decision to get the Galaxy Note 3. I still have unlimited data, but average around 2 GB a month so it's not something I absolutely need. I've heard of loyalty plans that would decrease my bill a bit and potentially get me more data than 2 GB, so I'm looking into that.