This offering from VRC just about has it all. Exquisite attention to detail on the pieces and parts, animation all over the place give this a great piece of eye candy. A detailed 27 page instruction manual walks you through a total complete realistic start up and operating controls. If you are the lazy sort just push the z key and sit there for a minute or two and watch while the switches click in and the prime mover groans into life. The sounds are recorded from a real live U30 at the Illinois Railroad Museum and are first rate. For those of you old enough just close your eyes and remember.
Of course I have no idea of what driving one of these magnificent animals was really like but this thing just has a sense of heft and smoothness. This is a keeper and worth the investment. Additionally it's pretty easy to paint so I suspect there will be a lot of variations out there before this one has run it's course.
If you buy this you will not be disappointed.