I have the Williams scale 773. I run it with Lionel legends cars on my carpet central 072.
It's a great puller a little fast but real nostalgic.
I also have an mth j1e proto 2 and a Lionel j3a 6-28072..both great looking and great runners.
But I'm especially fond of my santa fe warhorse hudson, ( great sound -what a whistle) 6-18062.
Not a real santa fe hudson but a toned down 773 (missing valve gear, wrong wheels ect) , but for the $ can be had for the cost of a Williams. Never seen one repainted nyc. Might be a consideration.