I dont know man, just my particular taste I guess....
Since a PVD 217 would be a fantasy watch or a personal project watch, I guess I would just like it to look "complete" if that makes any sense.
Also since the 217 has a crystal case back, it would only be the "outer ring" that would be PVD'ed; now if the gen 217 had a closed case back then I would definitely leave it in SS like the gen pvd pams have it.
I guess it just doesn't make sense to me to buy DSN's PVD destro MM20 with the 217 dial, and still have to buy a 217 CG and case back and get at least the CG pvd'ed somewhere else, so I'm waiting on RBj's reply to see if I can buy a regular 217 and have him PVD it completely.