Yeah with me and my brother, it's barely more expensive than our 2gb plan.
Call them and ask about the legacy $40 6gb plan.
With rollover, unlimited music streaming, and 480p video, I really don't need unlimited for $30 more a month. If you aren't averse to wifi for browsing when you can you only are gonna use like 4gb, and then have a 10gb data vault if you ever do use 6 for some reason.