Haven't been online for awhile, but this topic was interesting so here's contributing anyways
In most cases, if money was no problem having a gen dial to makes a rep a franken (in most situations), and for me (personally) I prioritize based on the following...
Genuine dial (Or a really good alternative, because those cannot be unseen)
Genuine hands (esp the second hand for the subs)
Bezel / Insert as there's really no perfect aftermarket insert
702/700 Gen crowns (because 703 crowns look queer in a vintage build)
Things like xtal, bracelet, case, can still get by one way or another imho. But personally I love the use of a genuine vintage movement because of it's stability and you won't want to cut the feet off a genuine dial. For anything requiring date, it is a costly advantage to have a gen movement as well, because the datewheel sticks out.
I have the 4 builds below all running on 1530/60/70 movements, the ones on the left have gen dials and the ones of the right have dials by ivanabcxyz. All in all it comes down to working within your budgets and drawing the line on what makes a satisfactory project. Either way it's a rabbit hole with no end.
Enjoy the process either way!