I would just go in for the extra $15 from $65.
But if you want to go on the cheap side, t-mobile's prepaid phone plans currently has something similar to what you asked for.
100 min talk
unlimited data, first 5 gigs are unthrottled.
Maybe you could figure out a way to pay $60 for 10 gigs of unthrottled, or some sort of pay as you go data plan with them.