Unlimited is better I'm not sure what my data usage is to be honest. But I have the Unlimited everything plan from Boost Mobile (A Sprint company) that is $50 a month.
While this Android phone isn't as good as the iPhone it replaced, the iPhone sure wasn't worth the extra $700+ a year more it cost me to use. I'm just plain happy with my phone and unlimited data. Including tethering to my laptop when I need it.