I pay $25 a month for unlimited data and text on Virgin Mobile. Granted, nothing "unlimited" is really unlimited, but I stream music on my Android phone on this plan all the time and have not hit any soft or hard cap.
Also, Virgin Mobile in what country? I'm kind of curious if that plan's still available; seems most providers are scaling back.
Here's the link to the plan: http://www.virginmobileusa.com/cell-phone-plans/beyond-talk-...