We recommend something as simple as a handycam if you are just getting started. The main thing is to make sure whatever camera you plan to use is compatible with your video capture device.
Basic: Sony HDR RCX405
Mid-range: Panasonic AG-AC8PJ
Advanced: Panasonic AG-AC160A
For a more comprehensive list of camera recommendations and other specifications, you may download our complete equipment guide (attached). Our equipment guide has information about cameras, as well as additional hardware.