I appreciate more and more lately the quality of early MTH locomotives, those that preceded Proto1.
One in particular is the Railking NY Central L3 Mohawk steamer. Very smooth running, big and brawny and good at navigating 031 curves. Also, it's a good puller and has been very reliable and durable for as long time.
Since it runs quiet, it's a go to locomotive when my wife is asleep late at night or early in the morning.
Arnold