amanico[JLC Moderator]
374475
Wow... I would work on a parallel collection...
I would go for the Batman, to have a complete professional ( or almost complete ) line. Then, I would explore the same line in the vintage universe.
You already have two strong pieces with the 16550 and 16660. You need a 16750 or 16760, and a 16520, et voilà.
Best,
Nicolas