FlashVars, FlashRemoting, or another way of using dynamic content?

I need to find a good solution for my needs, but everyone seems to have a different way of doing things. I would like to use Flash, PHP, and MySQL to pass data from the DB to flash, and back. Nothing to crazy, just a back and forth. I have been using FlashVars, but it does not seem that quick, and only goes one way, could it be the speed of my MySQL server? What does everyone here use for dynamic content?