Very nice screenshots. Seligman is indeed a nice route to run. My only complaint about it is the same one that I have about almost all SLI routes--the towns just look half-done and very non-prototypical. It's less noticeable on Seligman because towns are few, but Flagstaff, for example, outside of the immediate depot area, just looks totally wrong.
One other note, while it is a handsome structure, for modern day running, the depot at Seligman has been gone for years.