What Is The Best Choice For A "No Contract" Carrier?

I have recently purchased the Nexus 4; "arrives in 5 to 6 weeks" and plan to use it on Straight Talk. Im a college student so i dont have the money to join a major carrier and sign a contract so i figured that joining Straight Talk would be a good choice. The problem is that i live in a rural area dominated by Verizon. I was wondering if anyone knew what was the best choice for a "No Contract" carrier/company, preferably one that would allow me to use my Nexus 4.