My dream D2C set would be the Hogwarts Express, done in an expert style, with at least two coaches, and Hogsmeade or Kings Cross station. You could do something beautiful with those. I'm a train fan anyway, and knew that all previous ones have been very inaccurate, but seeing 5972 Olton Hall, known more often as Hogwarts Castle (or amongst British train fans, the Hall that thinks it's a Castle (2 GWR classes of steam locomotive were the Hall class, and the Castle, with each locomotive being named xxx Hall or xxx Castle) as just increased my anger. The Hogwarts Express deserves a better representation, and it's also a set from four years ago now.