What is the best company for the iPhone 5 price wise and service?

I'm just curious what some of you are paying monthly for the iPhone, I'm up to $90 with Sprint. Is that the regular price or are some of you paying less than that? I got the $30 "unlimited data" and $50 for the minutes and messaging plus $11 for protection. I still have more than a week to get out of the contract. Please all responses are welcome and I only have the one line just for myself.

AT&T

Move to StraightTalk. You already have the iPhone 5 so you need not buy another iPhone with StraightTalk. You can get the phone unlocked and use it on StraightTalk's GSM service or you can get the phone flashed to StraightTalk's CDMA service. The later will require you to buy a phone from StraightTalk, although you can buy a cheap phone. Or you can go to SimpleMobile and enjoy 4G LTE as well. Check online for flashing iPhone to StraightTalk or factory unlocking the iPhone 5.