Best Prepaid Sim Card in Orlando for non US residents

Hi guys,

I'll be travelling to Orlando in two weeks and I'd like to know which is the best prepaid sim card plan for non US residents. I'll be using a lot more data than voice, so I don't even need a prepaid plan that has lots of minutes to talk.

I'll be with my own phone, so the idea is just buy a prepaid sim card plan that has a good amount of data, put it in my phone and call it a day.

Also, where can I buy it? Is it available on popular places like malls, Best Buy stores, Walmart or Target?