As everyone else has said, in that price range T2i is your only option. And, as others have mentioned, it is typical to spend MUCH more on lenses and accessories (like follow focus).
I'm in your boat, brother. At the time being, I can't afford any lenses. Nevertheless, I feel the T2i, with it's factory-packaged 18-55mm lense is still a better option than any conventional video camera you could buy with that amount of money. And, later on, when you've got more money, you can buy those lenses and fancy accessories.
There is an alternative to the super-expensive follow-focus. It can be jerryrigged with about $10 of equipment from your local hardware store. Of course it won't be the same, but you work with what you've got.
As for sound, you MIGHT want to record through the camera's external mic jack, but probably not. If you go straight to it, you're going to get lots of noise. There are XLR-to-mini adapters that will lessen this noise, but they're actually more expensive than a portable digital audio recorder, and with one of those, your camera is freed from that pesky mic cable. I can post links if you want; right now I'm just too tired and lazy to find those links.