All of the Rio Grande Southern "Galloping Goose" models and a few Camelback locos. Bachmann, are you listening? I think the "Goose" fleet is right up your alley and you could even do a parallel line-up of On3 Geese for the scale guys. Those "Goose" models are great for really small layouts and you can build an entire railroad around them. Those "Geese" can be addictive. If some company, like Bachmann, was to make the entire fleet, I would have to get them all.