Can you elaborate on "digital"?
Are you looking for something that records to flash memory, DVD or DV tape? DV gives you the most flexibility IMO. Recording to flash memory limits your recording time and DV tapes are cheaper then flash memory, especially when you buy in larger quantities. Recording straight to DVD is convenient if you don't intend on editing, otherwise, you need to decode the video from the DVD, edit it then encode it again... which means lower quality since you're getting the raw DV.
Consumer grade DV cameras of decent quality can be had pretty cheap these days...