Your traditional no compromise DI is to scan you film at 4k or 2k log DPX files.  Our conform and color grading  process is not any different than any of the all digital workflow we use. The added expense is just the film scanning.

For a more budget mined films, another option is to do a Log transfer to HDCAM SR or ProRess 444.  Then the conform and grade would be done as we would on the traditional DI. Our grading systems can do a data conform form DPX, Open EXR, Tiffs, ProRess 444, .mov  .MXF .r3d and more.