I've always liked the LEGO train system, but I never found the passenger stuff to be too detailed, or typical of what can be found in the U.S. It's always had a very European feel because, face it, that's where LEGOs are from. LDD has allowed me to design stuff with a more distinctly American feel, stuff that I've grown up watching go up and down the Hudson river.
Using Bricklink to track down parts, I now have photos of a real Rohr Turbo posted! My next project will be some New York Central stuff, the LDD design photos of which will be up soon. Some Metro-North stuff will come as finances permit, and then some Amfleet once I've figured out some styling stuff. Please comment on and suggest improvements to these concepts!