I would like to add a DVD recorder to my home theater but have no idea how to set it up to record live TV, and VHS, DVD, and DVR playback while keeping my current equipment: Mitsubshi WS55315 HDTV, Onkyo TXSR602 Surround, Moxi HD Reveiver/DVR, Panasonic DVD-CV52, and (2)Panasonic analog VHS's. What features should I look for in a DVD recorder? Would there be an advantage to a DVD recorder with a HDD?