I have a B&O Capitol Limited, a NYC 20th Century Limited, and two Broadway Limited sets, on as built, the other with the 50s mods. I also have sufficient care to represent several additional 50s era PRR Blue Ribbon trains, and a B&O Heavyweight consist. Unfortunately I do not have the room to run any of these trains on my layout, so they sit in boxes. I do like prototype length pike sized trains of three to five cars in length, but even those eat a lot of real estate. My solution is to run Budd RDCs.
Boris