A lot of people do not like the General Motors Aerotrain; I rather do, even though it has an unfortunate and not-coincidental frontal/windshield/"grille" resemblance to the perennially ugly 1959 Chevrolet.
I do not have one; but I think about it.
I would love to see a rendition of the NYC's lightweight Baldwin "Train X".
Better yet, the Gulf, Mobile and Northern's (later the Gulf, Mobile and Ohio's) ACF/Alco lightweight Rebel, a very early air-conditioned (yay!) streamliner running eventually between St. Louis and the Gulf Coast (Mobile and New Orleans). The Rebel was a better design than most early streamliners, like the Zephyr, as it was sleek but not articulated, and cars could be changed out at will, which would make the model easier to deal with, too.
(The Rebel ultimately became a "normal" passenger train, with regular equipment and pulled by Alco PA's)