Help me you guys with some suggestions about a provider change

I had for almost eight years a contract with Sprint, but now consider seriously to take a prepaid service way... Heard all a lot of providers in the US. I knew few things about some of them, but didn't really paid too much attention as I was concentrated only on my contract. Now, I found a list All Prepaid Wireless Cell Phone Plans and Providers | AllPrepaidPlans.com with all of them I guess, but I don't know for sure which one to choose. Can you help me guys, please? Any suggestion is welcomed. I think a Sprint reseller will be great, because I was quite pleased by this network services... Still, I don't know if the services of the network resembles to the ones offered by their resellers. Thank you very much for all your suggestions!