my Penn Central Lionel is my favorite, bought it sealed in the box, its pilot trucks like to come off the track so it doesnt get ran much, same problem with my williams silver 4866.. i picked up a Kline GG1, runs smooth, doesnt derail. no sounds though.
I’ve always had a fascination for PC, growing up my grandmother would take me to watch the trains on the platform at Lancaster train station, back before they made you buy a ticket before going down, there were these two grey ex NYC penn central marked baggage car's sitting on the siding closest to the station, just something about them. Penn Central had some of my favorite equipment, the best from NYC, New Haven, and PRR. just the multitude of equipment.
You cant forget about New Jersey transit, they had the last operating GG1, Big Red. someone had a NJT gg1 for sale on the fourm not to long ago. think it was kline