I'm a rider, not a serious collector. Therefore, for me it should 'look' vintage and pass the 10' inspection test, but it has to ride well and be adapted for my body and riding style.
So, while the DeRosa is original & the Mondia is at least period correct the others are not.
The Merckx got compact 48/34 chainrings.
The Harding/Holdsworth went 46/30 with cyclocross 33mm tires.
4 of 6 vintage are friction 6sp, 1 is 7sp indexed (shifter on the downtube).
The latest (Batavus) will be Campy 9sp triple, because that's what I have on hand.

Threads like this always make me feel guilt for not upgrading some parts - mostly brakes/levers.

I do like tubular wheels and have been picking them up affordably when I can. Sometimes the hubs may not match, and that's OK for me.