Are you planning on the final film being transferred back from HD onto film, or are you planning on having the negative cut?
DVCPRO HD is a compressed form of HD that FCP can capture via firewire. But it isn’t suitable for blowing up to film. What people generally do (what I did) was trasnfer the film to D5, have DVCAM dubs made with matching timecode, edit and then go to a facility that could edit with the D5 master and online the project. Then you have a D5 master than can be transferred to film.
To edit any other form of HD other than DVCPRO HD you’ll need an HD capture card and high speed drive RAIDS, which is why it is wise to online and finish at a facility that has that setup.
Shane Ross
Alokut Productions
http://www.lfhd.net