Personally I would telecine to digiBeta and make a DVCAM clone for editting in FCP. The timecode the digiBeta should be matched with the TC on the DVCAM. You can perform your edits from your DVCAM source by bringing the material into FCP through "most" miniDV cameras and deck. Check to be sure they read the DVCAM timecode. DigiBeta is a far more stable and robust medium than miniDV and would be better to "re conform" from should you need to up-res. from DV.
Color space betaSP is roughly equivalent to DV, however, as betaSP is an analog source and A to D and D to A conversion will possibly cause it to suffer. Additonally, dubbing and analog source definitely shows generation loss.
Good luck.