I think much of it still holds true. The best base watch to start is either the BK WM9 or TC. They are just tougher to find because they are no longer made. If you don't want to go that route, then the JF or ST cases are the most reasonable base to start from. IF you pick up an entire JF, you would get the SH3135, and then you could use gen hands (solving one of your stated issues), and gen DW.
You really should do your own research. All of these builds have some compromises, and only you know what will be acceptable for you.
I rarely like to send people elsewhere, but here's the best collection of posts I have seen on the 16613.
https://forum.replica-watch.info/forum/rolex-tudor-replicas/235295-a-guide-to-16613-builds-frankening
Personally I wouldn't do the conversion unless your v72 has to go in for service anyway, and you can find the parts for a great price. I'm also not sure that the gen pushers are worth the price you'll pay.
Rest of your choices are good. Dials are hit and miss, but you'll want to go for one of the VN dials unless you can find one of the original batch of DW's. You just missed a great black "big red" VN dial for sale that already had the gen coronet installed. Might want to check with the seller (sputim) to see where he acquired it, or if he has any others.
Obviously the hard part is finding the v72 without spending insane money. If you look through my Daytona build thread there are some hints at brands and alternative movement IDs to help locate one.
My brand new Accutron with an ETA 7750 for $286 (linked below) was probably my best buy. Wanted to swap the movement into my IWC 3717 but the watch was too nice. Also got both my 2846's for my Rolex builds from donor "Swiss Military" watches. I don't think they were NOS, but bargains nonetheless at $28 each.
Accurate? No. Their movements are too complicated. The Datograph Chronos were gorgeous, just not all that accurate. Not sure if they are still available.
http://www.marywatch.net/goods.php?id=872
If you want something more passable, the regular Langematick (non tourby), Saxonia and 1815 are all OK. They are simple watches that can use a standard Chinese movement.
The Richard Lange was probably the best, but not sure if it's still made.
If you're asking me, I bought a set of WSO 455's as well. The 580's fit better with the case I used (gen 16014) and allowed for the Aussie springbars which I believe were a bit thicker.