I have the K-Line 8 car set and love it. It has been my favorite train. But I have had some other people's Atlas cars on the layout and the detailing is awesome. I knew that I had to buy an Atlas observation car even if I just used it as a private owner excursion on the back of a modern Amtrak train. But the detail on it is so stunning that it has been wearing me down. I'm at the point where I don't know whether to add a second set of Atlas cars or replace my K-Line set? And I am pulling my K-Line cars with Lionel Western Pacific F units and I probably will have to go with the newly announced 3rd Rail CB&Q E units. Decisions...decisions! So many great choices, great time to be in the hobby.
Art