In theory, you should be able to “re-link” the DV clips to the HDV files. I have not tested this. Worse case scenario is that you manually match the footage. If using the EDL, the only things that matter are the reel name (Tape Name) and the Timecode.
Premiere, to my knowledge, does not handle Cineon or DPX files. You will need to convert them in AE (Be sure to do a LOG to Linear conversion… Interpret Footage/More Options). You could create both HD and DV proxies at the same time (Don’t forget that you can have more than one output module!)
You should assign unique start Timecode to the conversion comps in AE.