AT&T Wireless - You might want to give them a call
I saw their commercial offering 4 lines with unlimited talk & text with 10 Gb of shared data for $160/month. I have the same plan but was paying a lot more even with a 24% corporate discount. I got it switched to their new plan and now I am saving $70/month. ::Banana::
EDIT: I have had AT&T wireless for a longtime. The one thing I have learned over the years is that they do not automatically lower you rate plan when there is a "special" deal on your exact same plan. Once you have the special deal they usually dont jack up the price like the @#$!* cable companies.