Tmobile here. 1000 min, unlimited text and 2g data before speed throttles down. Total for two phones: 80...but I did bring an unlocked phone of my own so hit up the value plan.
That being said, I'd say 50-75/mo is reasonable for unlimited every thing depending on what carrier options you have. I beleive tmo is the only one offering unsubsidized plans (where the phone price isn't built in to your monthly fee) but I've heard service varies depending on where you are in the country.
Boris Becker Melbourne
"To resist despair in this world is what it is to be free"