Collecting video evidence is what all investigators strive for. And to this end there are also lots of video equipment to try and accomplish this goal. Many manufacturers support IR right off the shelf. Several paranormal shops on the internet also offer modified equipment that are full spectrum, which allows it to see in a broader spectrum of the light range that is not typically visible to the human eye. Once again, let your personal preference and budget dictate your choice in equipment. When purchasing from a paranormal store online, do the research to make sure the seller is reputable and that there have been no problems reported with it.
An important piece of gear to go with the camcorder is a good IR light. Many camcorders do not have one or have a very weak IR light. It is always best to pick up extra lights that can be mounted either to the camera or mounted to a rig that hooks up to the cameras tripod connector.
You can find everything you need at GhostStop. Visit there Camcorder or Lighting product pages to see what they offer.