What is the best cell service in Oklahoma?

I currently have AT&T. In Stillwater and OKC AT&T towers were purchased by Alltel. I have reviewed several companies on the internet. Which service is the best in Oklahoma? I travel around the state, especially in the Oklahoma City and Tulsa area. I have heard Verizon has the best customer service, but the service area in Oklahoma is not very large. I actually live in the country south of Stillwater and work in OKC. I would sincerely appreciate any help with selecting a cell phone service in Oklahoma. Any additional info about cell phones would be appreciated also. I thought I would get a motorola. Any suggestions? Thank you!