I would shoot in HDV, let the camera down-convert to DV, edit and burn.
To edit now in HDV would require 3X the hard drive space…more hard drive and processor speed and probably the Cineform Aspect codec ($500).
To author now would require HD authoring software ($500), HD burner ($800), HD player ($500), HD TV ($1,200).
You can later recapture as HDV and create a HDV version.