DVCPROHD is a 100Mbit signal- it requires only about 4x the storage of standard DV. You can use internal SATA drives and FW800s to cut with. The camera can act as a playout to your NTSC monitor or you can get one of the BMD or Kona cards to do the downconvert. If you have FCP 5 it’s a total no-brainer.
Noah