I'm seconding (third-ing?) the idea of offering empty well cars, now that there is a growing selection of containers to put in them (Atlas O does this). One could conceivably acquire a string of well cars over time and economically equip them with a random-looking assortment of modern-looking containers, without having to figure out what to do with all those Yang Ming containers one would ordinarily have acquired in the process.
Viva Variety!
---PCJ