Though not a UP fan, I have the MTH RK version. It is what I call "nice Railking";
the model is well done, not tiny, and they even bothered to put the Boxpok drivers
at the Main driver position, spoked elsewhere. This touch is not always done in
sub-scale. It runs well for PS1 (that is, no cruise control).
I like the shape of the loco, and I had a chance to grab another of the PS1 models for
really, really cheap...it's been run more than a little, but is still sound, and due
for a custom freelance non-UP repaint someday. Probably black, with a few highlights.
I, too, would like to see the 4-8-2 version of this styling in affordable RK.
I've wondered why MTH has never offered this 49'er RK loco painted for the NYC Mercury -
perfectly proper RK thing to do, and the locos have very similar looks; the tender, also.
MTH has offered some far less convincing fantasy locomotive/paint schemes.