3 camera shoot (HVX200, HMC150, 5D), is best editing format prores422?

Just did a 3 camera shoot--used the hvx200, hmc150, and a 5DmkII. Shot them all at 1080p30.

I'm getting ready to ingest the footage, and am wondering about the best editing format. the HVX footage is DVCPROHD already, so would it be wise to convert footage from the other two cameras to DVCPROHD, or should I use Prores422 for the HMC and 5D footage and just convert my HVX footage to Prores422 after the initial DVCPRO50 conversion?

This will not be an effects-heavy program at all, so DVCPROHD would be adequate, I'm sure. But if I can send the footage through less generations of conversion, I think the Prores 422 route is probably the quickest, since FCP can ingest the HMC footage as Prores422 and MPEG Streamclip can do an easy conversion to Prores422 of the 5D footage.

thoughts? what am I not thinking of?

ProRes HQ. I did a comparison here:

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