Help me find a cell phone plan?

I've been using Tracfone for 3 years now. I recently got the new LG 800G thinking it was gonna be great. It's by far the best Tracfone but kind of a disappointment. Anyway, I am thinking about switching companies. But, since I'm only fourteen and don't make that much money working as a bag boy, I need a cheap one. I figured out I send about 500 texts per month, but would probably send more if Tracfone minutes werent so dang expensive. I've heard about the T-Mobile plan thats $15 for unlimited text, which sounds awesome, but I'm convinced theres a catch. What plan from what company should I get?